Calculate the missing amounts for each of the following firms: (Do not round Intermediate calculations. Round "Selling Price" and "Variable Costs Per Unit" to 2 decimal places. Enter any negative amount with a minus sign.) Units Sold Selling Price Variable Costs Per Unit Contribution Margin Fixed Costs Operating Income (Loss) Firm A Firm B 10,200 $ 26.00 $ 102,600 $ 40,800 8,700 17.00 65,300 32,700 Firm C 7.00 3.80 10,500 (5,560) Firm D 4,520 45.00 40,950 51,830