GMAT Problem Solving (PS) | Re: From the sale of sleeping bags, a retailer made a gross

Since the retailer made a profit of 12% of the wholesale cost:

profit = 0.12(cost)

revenue - cost = 0.12(cost)

28 - cost = 0.12(cost)

28 = 1.12c

28/1.12 = c

25 = c = wholesale cost

Answer: D

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