连接:黑色星期五购物

Black Friday is one of the busiest shopping days of the year. Many of the concepts we discussed in this chapter are essential to computations around shopping. 
::黑色星期五是一年中最繁忙的购物日之一,我们在本章中讨论的许多概念对于围绕购物进行计算至关重要。

Sales Tax
::销售销售税

1. You want to buy a tablet computer that regularly costs $350. If sales tax on the tablet is 5%, what is the total price of the tablet? 
::1. 购买平板电脑通常需要350美元,如果平板电脑的销售税是5%,那么平板电脑的总价格是多少?

2. Using the sales tax percentage from your state, give an algebraic expression representing the total purchase price . 
::2. 使用贵国的销售税百分比,用代数表示总购价。

Sales and Coupons
::和销售成本

3. The store that you plan to buy the tablet from has a sale of 40% off for the first 6 hours that the store is open. After the first 6 hours, the sale is 25% off. You also have a coupon for $50. Which is the better deal:
::3. 你计划从商店购买平板电脑的商店在店开业前6小时内销售40%的平板电脑,头6小时后销售25%。你还有50美元的优惠券。这是更好的交易:

播放段落
• Purchasing the tablet in the first 6 hours of the sale and saving the coupon for another day, or
  :b) 在出售的头6小时购买平板电脑,并将优惠券另存一天,或
播放段落
• Purchasing the tablet after the first 6 hours and using the coupon?
  ::头6小时后买平板 并使用优惠券?

4. Does it matter if the coupon is deducted first, then the percent discount or vice versa?
::4. 如果先扣除优惠券,然后扣除百分比折扣,还是反之亦然,这是否重要?

Interest Rate Repayment
::利息利率还款

5. You decide to pay for the tablet with a credit card. The annual percentage rate (APR) on your credit card is 12% or 1% per month. If you want to pay off the purchase cost in 6 months, how much will the tablet actually cost?
::5. 你决定用信用卡支付平板电脑的费用,信用卡的年百分比为每月12%或1%,如果你想在6个月内支付购买费用,平板电脑实际要花多少钱?

Markup
::标记标记标记

The markup of an item is how much additional money the store charges based on the original cost of making the item.
::一项物品的标记是,根据制造物品的原始成本,商店收取的额外费用是多少。

6. If the tablet costs $195 to make and the markup was 79.5% originally, at what discount off the sales price would they not make a profit?
::6. 如果平板牌价为195美元,而最初加价为79.5%,那么按什么折扣销售价格,他们不会赢利?