Using the high-low method, the estimated variable cost of sales per unit sold is

The following information is available for a company's cost of sales over the last four months. $ 33,000 $ 39,500 $ 51,500 $ 63,500 Month January February March April Units Sold 450 850 1,850 2,650 Total Costs Using the high-low method, the estimated variable cost of sales per unit sold is: