A small engine repair shop purchased materials costing $9,000 in July. The beginning inventory of material parts was $4,500 and the ending inventory of material parts was $4,000. Payments for direct labor for July totaled $27,000, secretarial costs were $2,000, and overhead of $5,000 was incurred. In addition, $5,000 was spent on advertising and $2,000 for the franchise name. Revenue for July was $50,000. en What is the gross margin for July? Select one: a. $8,500 b. $41,500 . $1,500 d. $43,500