The following information is available for a company's cost of sales over the last five months Nonth January February March April Units soldCost of sales 510 790 1,550 2,510 $30,600 $36,500 $48,500 $60,500 Using the high-low method, the estimated total fixed cost is Muitiple Choice $29,900 45,952 $21,965 $91,904 $22,976