Ex 4-7 High-low method Inc. has decided to use the high-low method to estimate the total cost and the fi duction are as follows: xed and variable cost components of the total cost. The data for various levels of pro- Units Produced 10,000 15,000 22,500 Total Costs $700,000 840,000 920,000 a. Determine the variable cost per unit and the fixed cost. b. Based on part (a), estimate the total cost for 14,000 units of production