The following data have been extracted from the records of Puzzle Incorporated: Production level, in units Variable costs Fixed costs Mixed costs Total costs February 9,600 August 19,200 $ 19,200 ? 17,004 $ ? 39,500 ? $ 75,704 $ 106,808 Required: a. Calculate the missing costs. b. Calculate the cost formula for mixed cost using the high-low method. c. Calculate the total cost that would be incurred for the production of 12,800 units. d. Identify the two key cost behavior assumptions made in the calculation of your answer to part c. Complete this question by entering your answers in the tabs below. Required A Required B Required C Required D Calculate the missing costs. Note: Do not round intermediate calculations. February August Production level, in units 9,600 19,200 Variable costs $ 19,200 Fixed costs 39,500 Mixed costs 17,004 Total costs $ 75,704 $ 106,808