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2. This popular cardigan that is 'slimming and flattering' is ...

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   It truly is a gift from the sweater gods, and it's only $30 with the on-page coupon, down from $60. Amazon. ... it's 50% off at just $30 (down from $60) in many colors — it's even cheaper now ...

3. This knit jacket that is better than 'JCrew cardigans' is on ...

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   This knit jacket that is better than 'JCrew cardigans' is on sale for just $30 — that's over 50% off! Rachel Roszmann and ... 40% off is a discount that's hard to beat. ... Pura D'or 20% Vitamin ...

4. Where to shop today's best sales: 25% off an iPad, 20% off ...

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   Le Creuset Signature Round Dutch Oven, 5.5 Quart. Cook like Ina Garten this fall and winter with the queen's favorite 5.5-quart Dutch oven, now 20% off at Sur La Table. You can score the stunner ...

5. Buy one, get one free - Wikipedia

   en.wikipedia.org/wiki/Buy_one,_get_one_free

   The economist Alex Tabarrok has argued, that the success of this promotion lies in the fact that consumers value the first unit significantly more than the second one. So compared to a seemingly equivalent "Half price off" promotion, they may only buy one item at half price, because the value they attach to the second unit is lower than even the discounted price.

6. Coupon collector's problem - Wikipedia

   en.wikipedia.org/wiki/Coupon_collector's_problem

   Coupon collector's problem. In probability theory, the coupon collector's problem refers to mathematical analysis of "collect all coupons and win" contests. It asks the following question: if each box of a given product (e.g., breakfast cereals) contains a coupon, and there are n different types of coupons, what is the probability that more ...

7. QR code - Wikipedia

   en.wikipedia.org/wiki/QR_Code

   The QR code system was invented in 1994, at the Denso Wave automotive products company, in Japan. [5] [6] [7] The initial alternating-square design presented by the team of researchers, headed by Masahiro Hara, was influenced by the black counters and the white counters played on a Go board; [8] the pattern of position detection was found and determined by applying the least-used ratio (1:1:3 ...

8. Where to find today's best sales: Enjoy $25 for an Amazon ...

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   Save $20 with coupon. See at Amazon. Levoit Core Mini Air Purifier. $40 $50. Save $10. ... This cute, comfy knit top is on sale for just $30 (50% off!). It has an oversized fit, crewneck, trendy ...

9. Discount window - Wikipedia

   en.wikipedia.org/wiki/Discount_window

   The discount rate was cut by 50 bp—to 5.75% from 6.25%—and the term of loans was extended from overnight to up to thirty days. That reduced the spread of the primary credit rate over the federal funds rate from 100 basis points to 50 basis points.