ABC Co. manufactures pens. During the most productive month of the year, 3,650 pens were manufactured at a total cost of $84,550. During its slowest month, the company made 1,250 pens at a cost of $46,150. Calculate the total fixed cost using the high-low method of cost estimation. a. $28,300 b. $27,800 c. $26,150 d. $25,650