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Buy from Amazon $37.54$15.52 $40.00 $35.00 $30.00 $25.00 $20.00 Dec Mar Jun Sep Dec Mar Jun Sep Dec Mar Jun 2014 2015 2016 $24.66, Sep 14 6:41 pm$33.25, Nov 18 - Nov 23$32.58, Nov 25 - Nov 27$32.80, Nov 29 - Dec 1$33.45, Dec 2 - Dec 5$34.11, Dec 7 - Dec 12$34.79, Dec 14 - Dec 18$35.10, Dec 21 - Jan 15$34.39, Jan 16 - Jan 21$33.70, Jan 22 - Jan 25$33.02, Jan 26 - Jan 30$32.38, Jan 31 - Feb 4$32.69, Feb 5 - Feb 16$32.17, Feb 17 - Feb 21$32.38, Feb 22 - Feb 28$32.07, Feb 28 - Mar 2$31.76, Mar 3 - Mar 4$31.55, Mar 5 - Mar 6$32.17, Mar 7 - Mar 10$32.38, Mar 10 - Mar 11$32.49, Mar 12 - Mar 13$32.97, Mar 14 - Apr 2$32.64, Apr 2 - Apr 5$32.31, Apr 6 - Apr 11$32.02, Apr 12 - Apr 16$31.86, Apr 16 - Apr 20$31.89, Apr 21 - Apr 24$31.73, Apr 24 - May 2$31.41, May 3 - May 7$27.85, May 3 - May 4$27.41, May 3 - May 7$31.41, May 3 - May 7$27.41, May 3 - May 7$26.94, May 5 - May 8$31.86, May 7 - May 11$27.86, May 7 - May 11$26.95, May 8 10:13 pm$31.86, May 7 - May 11$27.86, May 7 - May 11$26.94, May 9 - May 18$31.54, May 12 - May 16$27.54, May 12 - May 16$26.94, May 9 - May 18$31.41, May 17 - May 21$27.41, May 17 - May 21$26.94, May 9 - May 18$31.41, May 17 - May 21$27.41, May 17 - May 21$26.89, May 20 6:26 pm$31.49, May 21 - May 25$27.49, May 22 - May 25$26.88, May 23 4:56 am$31.49, May 21 - May 25$27.49, May 22 - May 25$26.82, May 25 5:15 pm$31.65, May 26 - May 29$27.65, May 26 - May 29$26.77, May 28 5:23 am$29.21, May 30 - Jun 7$26.92, May 31 12:24 am$25.21, May 30 - Jun 1$29.21, May 30 - Jun 7$28.82, Jun 2 12:38 am$26.63, Jun 2 12:38 am$29.21, May 30 - Jun 7$28.82, Jun 4 7:13 pm$23.75, Jun 4 7:13 pm$29.21, May 30 - Jun 7$25.21, Jun 5 - Jun 7$23.71, Jun 7 4:20 am$29.79, Jun 8 - Jun 13$25.79, Jun 8 - Jun 13$23.67, Jun 9 8:14 am$29.79, Jun 8 - Jun 13$25.79, Jun 12 5:59 am$25.79, Jun 8 - Jun 13$30.08, Jun 13 - Jun 17$26.08, Jun 13 - Jul 2$25.75, Jun 13 - Jun 18$30.38, Jun 18 - Jun 22$26.08, Jun 13 - Jul 2$25.74, Jun 19 - Jun 20$30.38, Jun 18 - Jun 22$26.08, Jun 13 - Jul 2$23.77, Jun 21 - Jun 25$30.98, Jun 24 - Jun 25$26.08, Jun 13 - Jul 2$23.77, Jun 21 - Jun 25$31.28, Jun 26 - Jun 28$26.08, Jun 13 - Jul 2$23.95, Jun 25 - Jun 26$31.44, Jun 29 1:07 am$26.08, Jun 13 - Jul 2$23.90, Jun 29 1:07 am$31.75, Jun 30 - Jul 4$26.08, Jun 13 - Jul 2$23.86, Jul 1 - Jul 5$31.75, Jun 30 - Jul 4$27.75, Jul 4 2:53 am$23.86, Jul 1 - Jul 5$31.97, Jul 5 - Jul 8$27.97, Jul 5 - Jul 8$24.48, Jul 6 3:19 pm$31.66, Jul 9 - Jul 11$27.66, Jul 11 5:01 pm$25.76, Jul 9 - Jul 21$31.45, Jul 12 - Jul 21$27.45, Jul 12 - Jul 21$25.76, Jul 9 - Jul 21$31.40, Jul 22 - Aug 1$27.40, Jul 26 - Jul 27$27.40, Jul 23 - Jul 29$31.40, Jul 22 - Aug 1$27.41, Jul 28 - Jul 30$27.40, Jul 30 7:36 pm$31.45, Aug 2 - Aug 17$27.46, Aug 2 - Aug 8$27.45, Aug 7 4:35 am$31.45, Aug 2 - Aug 17$27.45, Aug 9 - Aug 11$27.45, Aug 9 - Aug 15$31.45, Aug 2 - Aug 17$27.46, Aug 12 3:29 am$27.45, Aug 9 - Aug 15$31.45, Aug 2 - Aug 17$27.45, Aug 9 - Aug 15$27.38, Aug 14 1:51 am$31.45, Aug 2 - Aug 17$27.27, Aug 17 10:35 am$27.26, Aug 17 - Aug 26$31.55, Aug 18 - Aug 24$27.26, Aug 17 - Aug 26$27.19, Aug 19 1:54 pm$31.55, Aug 18 - Aug 24$27.26, Aug 17 - Aug 26$27.11, Aug 21 3:37 pm$31.55, Aug 18 - Aug 24$27.26, Aug 17 - Aug 26$25.52, Aug 24 5:11 pm$31.86, Aug 25 - Aug 31$27.26, Aug 17 - Aug 26$25.46, Aug 26 7:25 pm$31.86, Aug 25 - Aug 31$27.26, Aug 29 - Sep 17$25.41, Aug 29 12:31 am$31.86, Aug 25 - Aug 31$27.26, Aug 29 - Sep 17$25.36, Aug 31 8:52 am$32.17, Sep 1 - Sep 7$27.26, Aug 29 - Sep 17$25.31, Sep 2 5:17 pm$32.17, Sep 1 - Sep 7$27.26, Aug 29 - Sep 17$25.20, Sep 5 2:43 am$32.17, Sep 1 - Sep 7$27.26, Aug 29 - Sep 17$25.10, Sep 7 11:39 am$32.28, Sep 8 - Sep 9$27.26, Aug 29 - Sep 17$24.97, Sep 9 9:23 pm$32.60, Sep 12 - Sep 20$27.26, Aug 29 - Sep 17$24.84, Sep 12 6:17 am$32.60, Sep 12 - Sep 20$27.26, Aug 29 - Sep 17$24.67, Sep 15 12:44 pm$32.60, Sep 12 - Sep 20$27.26, Aug 29 - Sep 17$24.56, Sep 17 3:20 pm$32.60, Sep 12 - Sep 20$27.26, Sep 19 - Sep 25$24.48, Sep 19 6:55 pm$32.92, Sep 22 - Sep 27$27.26, Sep 19 - Sep 25$24.40, Sep 22 8:50 am$32.92, Sep 22 - Sep 27$27.26, Sep 19 - Sep 25$24.31, Sep 24 1:30 pm$32.92, Sep 22 - Sep 27$28.81, Sep 27 - Sep 29$24.18, Sep 27 7:44 pm$33.24, Sep 28 - Oct 6$28.81, Oct 2 - Oct 6$24.37, Sep 29 - Oct 2$33.24, Sep 28 - Oct 6$28.81, Oct 2 - Oct 6$24.27, Oct 5 8:41 am$33.52, Oct 7 - Oct 13$28.85, Oct 7 1:04 pm$24.21, Oct 7 1:04 pm$33.52, Oct 7 - Oct 13$28.82, Oct 9 6:03 pm$24.17, Oct 9 6:03 pm$33.52, Oct 7 - Oct 13$28.81, Oct 11 10:05 pm$23.55, Oct 11 10:05 pm$33.32, Oct 14 - Oct 18$28.82, Oct 13 - Oct 14$24.15, Oct 13 - Oct 14$33.32, Oct 14 - Oct 18$29.32, Oct 15 - Oct 19$24.11, Oct 16 - Oct 20$32.98, Oct 19 - Nov 4$29.32, Oct 15 - Oct 19$24.11, Oct 16 - Oct 20$36.45, Oct 22 - Oct 23$32.98, Oct 19 - Nov 4$28.98, Oct 20 - Nov 4$36.43, Oct 24 - Oct 29$32.98, Oct 19 - Nov 4$28.98, Oct 20 - Nov 4$36.41, Nov 1 - Nov 4$32.98, Oct 19 - Nov 4$28.98, Oct 20 - Nov 4$36.39, Nov 8 - Nov 11$32.81, Nov 8 - Nov 14$29.61, Nov 8 - Nov 11$36.37, Nov 14 3:46 am$32.81, Nov 8 - Nov 14$28.82, Nov 14 - Nov 19$32.48, Nov 16 - Nov 22$28.82, Nov 14 - Nov 19$28.48, Nov 18 - Nov 24$32.15, Nov 23 - Nov 28$29.37, Nov 22 - Dec 1$28.48, Nov 18 - Nov 24$32.15, Nov 23 - Nov 28$29.37, Nov 22 - Dec 1$27.51, Nov 25 - Nov 30$31.82, Nov 29 - Dec 5$29.37, Nov 22 - Dec 1$27.51, Nov 25 - Nov 30$31.82, Nov 29 - Dec 5$28.82, Dec 2 - Dec 11$28.48, Dec 1 - Dec 5$32.13, Dec 6 - Dec 12$28.82, Dec 2 - Dec 11$27.54, Dec 7 5:58 am$32.13, Dec 6 - Dec 12$28.82, Dec 2 - Dec 11$26.98, Dec 9 8:42 am$32.13, Dec 6 - Dec 12$27.50, Dec 12 8:21 am$27.50, Dec 12 - Dec 17$31.50, Dec 13 - Dec 17$27.50, Dec 12 - Dec 17$27.43, Dec 15 9:13 am$31.50, Dec 13 - Dec 17$27.50, Dec 12 - Dec 17$27.47, Dec 17 8:54 am$31.97, Dec 22 2:02 am$27.97, Dec 22 2:02 am$27.24, Dec 22 2:02 am$31.65, Jan 3 - Jan 8$27.65, Jan 3 - Jan 8$27.64, Jan 3 - Jan 4$31.65, Jan 3 - Jan 8$27.65, Jan 3 - Jan 8$27.62, Jan 5 - Jan 7$31.65, Jan 3 - Jan 8$29.37, Jan 8 - Jan 13$27.58, Jan 8 5:10 pm$31.49, Jan 9 - Jan 14$29.37, Jan 8 - Jan 13$28.47, Jan 11 - Jan 12$31.49, Jan 9 - Jan 14$29.37, Jan 8 - Jan 13$27.49, Jan 13 2:04 am$31.33, Jan 15 - Jan 21$29.37, Jan 15 - Jan 19$27.33, Jan 15 - Jan 16$31.33, Jan 15 - Jan 21$29.37, Jan 15 - Jan 19$28.47, Jan 17 - Jan 19$31.33, Jan 15 - Jan 21$28.82, Jan 20 - Jan 21$20.00, Jan 20 - Jan 21$31.17, Jan 22 - Jan 28$29.37, Jan 22 - Feb 3$28.04, Jan 23 9:33 am$31.17, Jan 22 - Jan 28$29.37, Jan 22 - Feb 3$26.84, Jan 25 11:15 pm$31.17, Jan 22 - Jan 28$29.37, Jan 22 - Feb 3$26.14, Jan 27 5:55 pm$31.01, Jan 29 - Feb 5$29.37, Jan 22 - Feb 3$25.30, Jan 30 9:53 am$31.01, Jan 29 - Feb 5$29.37, Jan 22 - Feb 3$28.47, Feb 2 4:16 am$31.01, Jan 29 - Feb 5$28.82, Feb 4 - Feb 12$27.60, Feb 4 2:19 am$30.69, Feb 5 - Feb 11$28.82, Feb 4 - Feb 12$21.85, Feb 5 - Feb 9$30.69, Feb 5 - Feb 11$28.82, Feb 4 - Feb 12$21.88, Feb 10 - Feb 11$31.45, Feb 12 - Feb 19$28.82, Feb 14 - Mar 2$25.89, Feb 16 - Feb 17$31.45, Feb 12 - Feb 19$28.82, Feb 14 - Mar 2$24.90, Feb 19 4:29 am$32.23, Feb 20 - Feb 26$28.82, Feb 14 - Mar 2$24.73, Feb 21 3:43 am$32.23, Feb 20 - Feb 26$28.82, Feb 14 - Mar 2$23.55, Feb 24 3:13 am$32.23, Feb 20 - Feb 26$28.82, Feb 14 - Mar 2$23.48, Feb 26 2:22 am$31.90, Feb 27 - Mar 4$28.82, Feb 14 - Mar 2$23.47, Mar 1 2:49 am$31.90, Feb 27 - Mar 4$23.49, Mar 3 - Mar 7$23.45, Mar 2 - Mar 3$31.58, Mar 5 - Mar 11$23.49, Mar 3 - Mar 7$23.44, Mar 5 6:01 pm$31.58, Mar 5 - Mar 11$23.49, Mar 3 - Mar 7$23.42, Mar 7 7:31 pm$31.58, Mar 5 - Mar 11$23.49, Mar 11 - Mar 14$23.36, Mar 11 2:24 am$31.26, Mar 12 - Mar 17$23.49, Mar 11 - Mar 14$23.35, Mar 12 - Mar 14$31.26, Mar 12 - Mar 17$26.64, Mar 15 - Mar 18$23.34, Mar 15 - Mar 17$30.94, Mar 18 - Mar 25$29.60, Mar 20 - Mar 23$23.33, Mar 20 8:15 pm$30.94, Mar 18 - Mar 25$29.60, Mar 20 - Mar 23$23.32, Mar 21 - Mar 23$30.94, Mar 18 - Mar 25$26.33, Mar 24 - Mar 25$20.00, Mar 25 - Mar 30$32.04, Mar 26 - Apr 1$27.41, Mar 26 - Apr 1$20.00, Mar 25 - Mar 30$32.04, Mar 26 - Apr 1$27.41, Mar 26 - Apr 1$25.53, Apr 1 9:21 pm$32.36, Apr 3 - Apr 8$27.72, Apr 3 - Apr 8$25.85, Apr 3 - Apr 4$32.36, Apr 3 - Apr 8$27.72, Apr 3 - Apr 8$26.12, Apr 5 11:51 pm$32.36, Apr 3 - Apr 8$27.72, Apr 3 - Apr 8$26.09, Apr 7 - Apr 21$32.68, Apr 10 - Apr 14$28.04, Apr 10 - Apr 14$26.09, Apr 7 - Apr 21$33.00, Apr 17 - Apr 25$28.94, Apr 17 - Apr 18$26.09, Apr 7 - Apr 21$33.00, Apr 17 - Apr 25$29.68, Apr 19 - Apr 23$26.09, Apr 7 - Apr 21$33.00, Apr 17 - Apr 25$29.68, Apr 19 - Apr 23$27.95, Apr 23 9:43 pm$33.00, Apr 17 - Apr 25$29.91, Apr 25 8:48 am$27.36, Apr 25 8:48 am$33.00, Apr 26 - May 7$29.00, Apr 26 - Apr 28$27.35, Apr 26 - Apr 28$33.00, Apr 26 - May 7$28.31, May 1 9:56 am$27.04, May 1 9:56 am$33.00, Apr 26 - May 7$27.82, May 2 7:10 pm$25.98, May 2 7:10 pm$33.00, Apr 26 - May 7$26.85, May 5 1:35 pm$25.78, May 5 1:35 pm$33.00, Apr 26 - May 7$26.30, May 7 1:17 am$25.10, May 7 1:17 am$33.32, May 9 - May 14$23.47, May 11 1:12 am$22.95, May 11 1:12 am$33.32, May 9 - May 14$24.70, May 12 - May 14$24.01, May 12 - May 14$33.65, May 16 - May 20$26.91, May 16 2:21 am$24.63, May 16 2:21 am$33.65, May 16 - May 20$26.27, May 18 2:18 am$24.45, May 18 2:18 am$33.65, May 16 - May 20$25.37, May 20 6:48 am$24.13, May 20 6:48 am$33.98, May 22 - May 26$24.68, May 22 11:13 am$23.37, May 22 11:13 am$33.98, May 22 - May 26$23.81, May 24 1:28 pm$22.89, May 24 1:28 pm$33.98, May 22 - May 26$23.23, May 26 5:11 pm$22.23, May 26 5:11 pm$34.31, May 28 - Jun 2$24.26, May 28 11:29 pm$21.92, May 28 11:29 pm$34.31, May 28 - Jun 2$23.59, May 31 7:10 am$22.77, May 31 7:10 am$34.31, May 28 - Jun 2$25.45, Jun 2 3:40 pm$22.12, Jun 2 3:40 pm$34.65, Jun 5 - Jun 11$24.76, Jun 5 12:17 am$22.08, Jun 5 12:17 am$34.65, Jun 5 - Jun 11$28.94, Jun 9 12:57 pm$22.01, Jun 9 12:57 pm$34.65, Jun 5 - Jun 11$28.30, Jun 11 1:34 pm$22.29, Jun 11 1:34 pm$34.99, Jun 13 - Jun 17$27.68, Jun 13 1:30 pm$22.25, Jun 13 1:30 pm$34.99, Jun 13 - Jun 17$27.31, Jun 15 11:45 am$22.03, Jun 15 11:45 am$34.64, Jun 19 - Jun 25$23.81, Jun 19 7:20 am$21.05, Jun 19 7:20 am$34.64, Jun 19 - Jun 25$23.14, Jun 21 5:51 am$21.56, Jun 21 - Jun 25$34.64, Jun 19 - Jun 25$23.94, Jun 23 - Jun 25$21.56, Jun 21 - Jun 25$34.29, Jun 27 12:46 am$25.67, Jun 27 12:46 am$21.55, Jun 27 12:46 am$32.83, Jul 1 - Jul 7$24.48, Jul 1 2:33 am$24.38, Jul 1 2:33 am$32.83, Jul 1 - Jul 7$23.78, Jul 3 - Jul 5$19.99, Jul 3 - Jul 7$32.83, Jul 1 - Jul 7$23.27, Jul 7 2:08 pm$19.99, Jul 3 - Jul 7$31.52, Jul 10 - Jul 22$23.01, Jul 10 - Jul 13$21.63, Jul 10 11:03 am$31.52, Jul 10 - Jul 22$23.01, Jul 10 - Jul 13$19.95, Jul 13 - Jul 15$31.52, Jul 10 - Jul 22$27.52, Jul 15 - Jul 22$19.95, Jul 13 - Jul 15$31.52, Jul 10 - Jul 22$27.52, Jul 15 - Jul 22$19.90, Jul 16 - Jul 20$31.52, Jul 10 - Jul 22$27.52, Jul 15 - Jul 22$18.99, Jul 22 11:26 am$30.93, Jul 26 - Jul 28$24.99, Jul 26 4:06 am$23.53, Jul 26 4:06 am$30.93, Jul 26 - Jul 28$26.93, Jul 28 1:25 am$20.00, Jul 28 1:25 am$29.93, Jul 29 - Jul 31$25.93, Jul 29 - Jul 31$21.57, Jul 29 9:15 pm$28.13, Aug 2 - Aug 6$24.13, Aug 2 1:28 pm$22.72, Aug 2 1:28 pm$28.13, Aug 2 - Aug 6$25.00, Aug 4 - Aug 6$22.73, Aug 4 9:23 am$28.13, Aug 2 - Aug 6$25.00, Aug 4 - Aug 6$21.50, Aug 6 - Aug 10$27.00, Aug 8 - Aug 12$23.00, Aug 8 - Aug 10$21.50, Aug 6 - Aug 10$27.00, Aug 8 - Aug 12$22.49, Aug 12 5:44 am$16.35, Aug 12 5:44 am$26.44, Aug 14 - Sep 3$22.44, Aug 14 5:37 am$20.60, Aug 14 5:37 am$26.44, Aug 14 - Sep 3$22.50, Aug 16 - Aug 20$20.51, Aug 16 5:37 am$26.44, Aug 14 - Sep 3$22.50, Aug 16 - Aug 20$20.60, Aug 18 5:49 am$26.44, Aug 14 - Sep 3$22.50, Aug 16 - Aug 20$21.50, Aug 20 6:04 am$26.44, Aug 14 - Sep 3$25.00, Aug 22 - Aug 26$22.08, Aug 24 5:44 am$26.44, Aug 14 - Sep 3$25.00, Aug 22 - Aug 26$21.82, Aug 26 5:48 am$26.44, Aug 14 - Sep 3$21.96, Aug 28 5:53 am$21.74, Aug 28 - Sep 1$26.44, Aug 14 - Sep 3$21.74, Aug 28 - Sep 1$21.72, Aug 30 4:55 am$26.44, Aug 14 - Sep 3$24.08, Sep 3 - Sep 5$21.96, Sep 1 - Sep 3$26.17, Sep 5 - Sep 24$24.08, Sep 3 - Sep 5$19.16, Sep 5 12:44 am$26.17, Sep 5 - Sep 24$22.93, Sep 7 - Sep 9$18.76, Sep 7 12:17 am$26.17, Sep 5 - Sep 24$22.93, Sep 7 - Sep 9$21.95, Sep 9 - Sep 10$26.17, Sep 5 - Sep 24$24.08, Sep 10 - Sep 16$22.15, Sep 12 - Sep 16$26.17, Sep 5 - Sep 24$22.93, Sep 18 8:45 pm$22.13, Sep 18 8:45 pm$26.17, Sep 5 - Sep 24$24.08, Sep 20 - Sep 26$17.45, Sep 22 8:04 pm$26.17, Sep 5 - Sep 24$24.08, Sep 20 - Sep 26$17.48, Sep 24 - Sep 26$26.44, Sep 26 - Sep 30$24.08, Sep 20 - Sep 26$17.48, Sep 24 - Sep 26$26.44, Sep 26 - Sep 30$22.93, Sep 28 - Sep 30$17.47, Sep 28 7:43 pm$26.44, Sep 26 - Sep 30$22.93, Sep 28 - Sep 30$17.29, Sep 30 8:22 pm$27.01, Oct 2 - Oct 9$24.39, Oct 2 - Nov 6$17.17, Oct 5 12:04 am$27.01, Oct 2 - Oct 9$24.39, Oct 2 - Nov 6$17.49, Oct 7 2:17 am$27.01, Oct 2 - Oct 9$24.39, Oct 2 - Nov 6$17.50, Oct 9 - Oct 11OOS $27.01, Oct 11 - Oct 21$24.39, Oct 2 - Nov 6$17.50, Oct 9 - Oct 11OOS $27.01, Oct 11 - Oct 21$24.39, Oct 2 - Nov 6$21.56, Oct 13 8:01 amOOS $27.01, Oct 11 - Oct 21$24.39, Oct 2 - Nov 6$22.94, Oct 17 7:53 amOOS $27.01, Oct 11 - Oct 21$24.39, Oct 2 - Nov 6$22.98, Oct 19 6:58 amOOS $27.01, Oct 11 - Oct 21$24.39, Oct 2 - Nov 6$22.95, Oct 21 6:42 amOOS $26.74, Oct 23 - Oct 25$24.39, Oct 2 - Nov 6$21.57, Oct 23 6:14 am$26.74, Oct 27 - Oct 29$24.39, Oct 2 - Nov 6$22.99, Oct 25 - Nov 2$26.72, Oct 31 - Nov 19$24.39, Oct 2 - Nov 6$22.99, Oct 25 - Nov 2$26.72, Oct 31 - Nov 19$25.99, Nov 4 6:57 am$24.39, Oct 2 - Nov 6$30.88, Nov 8 11:40 am$26.72, Oct 31 - Nov 19$22.73, Nov 8 - Nov 25$30.89, Nov 10 1:37 pm$26.72, Oct 31 - Nov 19$22.73, Nov 8 - Nov 25$27.38, Nov 12 - Nov 14$26.72, Oct 31 - Nov 19$22.73, Nov 8 - Nov 25$30.89, Nov 16 - Nov 30$26.72, Oct 31 - Nov 19$22.73, Nov 8 - Nov 25$30.89, Nov 16 - Nov 30$27.91, Nov 21 - Dec 10$22.73, Nov 8 - Nov 25$30.89, Nov 16 - Nov 30$27.91, Nov 21 - Dec 10$22.72, Nov 28 - Nov 30$27.91, Nov 21 - Dec 10$22.73, Dec 3 3:12 am$22.73, Dec 3 3:12 am$27.91, Nov 21 - Dec 10$22.72, Dec 5 2:47 pm$22.72, Dec 5 2:47 pm$27.91, Nov 21 - Dec 10$22.73, Dec 8 - Dec 10$21.38, Dec 8 2:47 am$27.91, Nov 21 - Dec 10$22.73, Dec 8 - Dec 10$21.39, Dec 10 5:11 pm$28.18, Dec 13 - Dec 23$22.72, Dec 13 - Dec 18$18.99, Dec 13 - Dec 15$28.18, Dec 13 - Dec 23$22.72, Dec 13 - Dec 18$21.38, Dec 18 11:28 am$28.18, Dec 13 - Dec 23$20.99, Dec 20 - Jan 5$19.74, Dec 20 11:41 pm$28.85, Dec 23 11:06 am$28.18, Dec 13 - Dec 23$20.99, Dec 20 - Jan 5$28.94, Dec 26 7:26 am$27.05, Dec 26 - Dec 31$20.99, Dec 20 - Jan 5$28.93, Dec 28 8:54 pm$27.05, Dec 26 - Dec 31$20.99, Dec 20 - Jan 5$28.63, Dec 31 5:29 am$27.05, Dec 26 - Dec 31$20.99, Dec 20 - Jan 5$28.62, Jan 2 3:51 pm$26.44, Jan 2 - Jan 14$20.99, Dec 20 - Jan 5$26.44, Jan 2 - Jan 14$25.99, Jan 5 1:28 am$20.99, Dec 20 - Jan 5$26.44, Jan 2 - Jan 14$20.93, Jan 9 10:37 pm$19.79, Jan 9 10:37 pm$28.07, Jan 12 10:55 am$26.44, Jan 2 - Jan 14$19.48, Jan 12 10:55 am$26.44, Jan 2 - Jan 14$19.18, Jan 14 10:53 pm$17.99, Jan 14 10:53 pm$26.57, Jan 17 - Jan 22$19.10, Jan 17 11:13 am$15.94, Jan 17 11:13 am$27.74, Jan 20 12:12 am$26.57, Jan 17 - Jan 22$19.04, Jan 20 12:12 am$26.57, Jan 17 - Jan 22$22.58, Jan 22 1:24 pm$18.96, Jan 22 1:24 pm$37.54, Jan 25 2:34 am$28.55, Jan 25 - Jan 30$18.90, Jan 25 2:34 am$28.55, Jan 25 - Jan 30$28.49, Jan 27 4:45 pm$18.83, Jan 27 4:45 pm$28.55, Jan 25 - Jan 30$18.77, Jan 30 5:30 am$15.90, Jan 30 5:30 am$29.69, Feb 1 - Feb 6$27.19, Feb 1 6:08 pm$22.73, Feb 1 6:08 pm$29.69, Feb 1 - Feb 6$24.54, Feb 4 8:01 am$23.30, Feb 4 - Feb 9$29.69, Feb 1 - Feb 6$23.54, Feb 6 10:02 pm$23.30, Feb 4 - Feb 9$28.26, Feb 9 - Feb 12$23.44, Feb 9 11:57 am$23.30, Feb 4 - Feb 9$28.26, Feb 9 - Feb 12$22.54, Feb 12 - Feb 14$19.30, Feb 12 2:43 am$29.69, Feb 14 - Feb 20$22.54, Feb 12 - Feb 14$19.27, Feb 14 7:21 pm$29.69, Feb 14 - Feb 20$19.15, Feb 20 3:07 am$19.15, Feb 20 3:07 am$31.80, Feb 22 - Feb 28$19.06, Feb 22 10:41 pm$19.06, Feb 22 10:41 pm$31.80, Feb 22 - Feb 28$19.07, Feb 25 5:57 pm$19.00, Feb 25 5:57 pm$31.80, Feb 22 - Feb 28$19.87, Feb 28 10:49 am$19.06, Feb 28 10:49 am$34.29, Mar 3 - Mar 9$19.73, Mar 3 5:38 pm$18.55, Mar 3 - Mar 9$34.29, Mar 3 - Mar 9$19.56, Mar 9 2:22 pm$18.55, Mar 3 - Mar 9$32.11, Mar 15 5:11 pm$20.53, Mar 15 5:11 pm$19.42, Mar 15 5:11 pm$33.39, Mar 27 - Apr 2$15.53, Mar 27 8:34 am$15.52, Mar 27 8:34 am$33.39, Mar 27 - Apr 2$17.54, Apr 2 5:25 am$17.54, Apr 2 5:25 am 14,356427,562 468,750 312,500 156,250 Oct Dec Feb Apr Jun Aug Oct Dec Feb Apr Jun 2015 2016

Price Details

New

Latest $33.39 Apr 2, '16
Highest $35.10 Dec 21, '13
Lowest $24.66 Sep 14, '13
Average $33.25 (30d avg)
$30.12 (90d avg)
$28.71 (180d avg)
$29.80 (365d avg)
$30.74 (Lifetime average)
Added Sep 14, 2013

3rd Party New

Latest $17.54 Apr 2, '16
Highest $29.91 Apr 25, '15
Lowest $15.53 Mar 27, '16
Average $18.74 (30d avg)
$19.64 (90d avg)
$21.37 (180d avg)
$23.34 (365d avg)
$25.50 (Lifetime average)
Added Sep 14, 2013

3rd Party Used

Latest $17.54 Apr 2, '16
Highest $37.54 Jan 25, '16
Lowest $15.52 Mar 27, '16
Average $18.73 (30d avg)
$21.58 (90d avg)
$23.42 (180d avg)
$22.84 (365d avg)
$24.58 (Lifetime average)
Added Sep 14, 2013

Sales Rank

30 day average: 141,524
90 day average: 110,274

Product Description



Award-winning author Page Keeley and mathematics expert Cheryl Rose Tobey apply the successful format of Keeleys best-selling to mathematics. They provide 75 formative assessment strategies and show teachers how to use them to inform instructional planning and better meet the needs of all students. Research shows that formative assessment has the power to significantly improve learning, and its many benefits include:


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