每位会员需为美发产品支付50美元。
价格指顾客为产品支付的金额。
他们还要估计在每种食物的卡路里的数量以及他们愿意为每种产品支付的金额。
They were also asked to estimate the number of calories in each food item and how much they would be willing to pay for each product.
Every time a product shows up it's bought and paid for, for the most part.
产品的每次出现都需要支付费用,在大多数情况下都是这样
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