Marcye Co. manufactures office furniture. During the most productive month of the year, 3,500 desks were manufactured at a total cost of $84,400. In its slowest month, the company made 1,100 desks at a cost of $46,000. Using the high-low method of cost estimation, total fixed costs are: a. $56,000 b. $28,400 c. $17,600 d. cannot be determined from the data given