Ingram 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 in August are: O $28,400 O cannot be determined from the data given O $17,600 $56,000