High-Low Method The manufacturing costs of Rosenthal Industries for the first three months of the year follow Total Costs Units Produced January $3,890,000 22,500 units February 2,800,000 35,000 March 4,230,000 55,000 Using the high-low method, determine (a) the variable cost per unit and (b) the total red cost a. Variable cost per unit b. Total Poved cost Check My Work Net