Ruby Corporation has provided the following information: Cost per Unit Cost per Period Direct materials $ 7.50 Direct labor $ 3.70 Variable manufacturing overhead $ 1.60 Fixed manufacturing overhead $ 121,500 Sales commissions $ 1.50 Variable administrative expense $ 0.45 Fixed selling and administrative expense $ 44,550 If 10,000 units are produced, the total amount of indirect manufacturing cost incurred is closest to: Select one: O a. $121,500 O b. $166,050 O c. $121,501.60 O d. $137,500