Problem 21-1A Measuring costs using high-low method P1 Alden Co.'s monthly data for the past year follow. Management wants to use these data to predict future variable and fixed costs. Month Units Sold Total Cost Month Units Sold Total Cost 1.... 320,000 $160,000 7 340,000 $220,000 2.... 160,000 100,000 8 280,000 160,000 3.... 280,000 220,000 9 80,000 64,000 200,000 100,000 10 160,000 140,000 5.... 300,000 230,000 11...... 100,000 100,000 200,000 120,000 12...... 110,000 80,000 Required 1. 2. Estimate both the variable costs per unit and the total monthly fixed costs using the high-low method. Use the answers for variable and fixed costs from part 1 to predict future total costs when sales volume is (a) 220,000 units and (b) 240,000 units.