A grocery store purchased 200 pounds of grapes at 0.60 per pound experience sHow is that 10 percent of the grapes will spoil at what price per pound would the store make 15 percent markup on cost?

.77 per pound.

Total cost = 200 pounds x .60 per pound = 120

Total pounds of grapes available for sale = (200 - (200 x .10 spoilage)) = 200 - 20 = 180

15 percent markup on cost = total cost x 1.15 or (total cost + (total cost x 15 percent)) = 120 x 1.15 = 138

Total markup price divided by total pounds of grapes = price per pound

138/180 = .766666 = .77