The following data have been extracted from the records of Puzzle Incorporated: February August Production level, in units 11,700 18,720 Variable costs $ 33,930 $ ?question mark Fixed costs ?question mark 32,000 Mixed costs 32,391 ?question mark Total costs $ 98,321 $ 134,334 Required: Calculate the missing costs. Calculate the cost formula for mixed cost using the highlow method. Calculate the total cost that would be incurred for the production of 14,508 units. Identify the two key cost behavior assumptions made in the calculation of your answer to part c