Riley Corporation's income statements for the last two years are presented below. Riley manufactured 7,500 and 10,500 school desks in 2020 and 2019, respectively and had no beginning or ending inventories. 2020 2019 Sales $3,750,000 $5,250,000 Cost of Goods Sold 258,000 332,850 Gross profit 3,492,000 4,917,185 Operating expenses 2,095,200 2,278,695 Net profit $1,396,800 $2,638,490 Instructions a b) Estimate the company's total variable cost per unit and its total fixed costs per year using the high-low method. 5 marks What is the equation of the line using the high-low method? 2 marks