15. Given the historical cost of product Z is $160, the selling price of product Z is $190, costs to sell product Z are $21, the replacement cost for product Z is $166, and the normal profit margin is 40% of sales price, what is the amount that should be used to value the inventory under the lower-of-cost-or-market method?

a. $ 93.

b. $160.

c. $169.

d. $166.