The following information is available for a company's cost of sales over the last five months. Month January February March April Units sold 530 770 1,450 2,530 Cost of sales $29,800 $35,500 $ 47,500 $59,500 Using the high-low method, the estimated total fixed cost is: Multiple Choice $43,860. $87,720. $23,060 $21.930. $29.700