The following data have been extracted from the records of Puzzle Incorporated: February August Production level, in units 9,400 15,980 Variable costs $ 27,260 $ ?question mark Fixed costs ?question mark 38,700 Mixed costs 24,464 ?question mark Total costs $ 90,424 $ 123,061 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 11,793 units. Identify the two key cost behavior assumptions made in the calculation of your answer to part c