Consider a family that buys one bottle of wine each week. With the 10% discount many stores offer on wine by the case, how much money would they be saving if they buy staples in bulk when they're on sale?

In order to calculate how much money the family would be saving by buying staples in bulk when they're on sale, we need to compare the prices of buying the wine by the case with buying them individually. Let's assume that the family buys 1 bottle of wine each week and the cost of a single bottle is $10. With the 10% discount offered by many stores on wine by the case, the cost of buying a case (containing, let's say, 12 bottles) would be $108 (12 bottles x $10 - 10%).

If the family chooses to buy the wine individually each week, they would spend $10 x 52 weeks = $520 in a year. On the other hand, if they buy a case once, they would only spend $108. Therefore, the amount of money saved by buying staples in bulk when they're on sale is $520 - $108 = $412.

By taking advantage of the 10% discount on wine by the case, the family would be saving $412 in a year.

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