A sporting goods store purchased $4,500 of ski boots in September. The store had $2,000 of ski boots on hand at the beginning of September, and expected to have $2,500 of ski boots at the end in order to cover part of anticipated October sales. What is the budgeted costs of goods sold for September? a. $6,500 b. $6,000 c. $4,500 d. $4,000