Calculate the missing amounts for each of the following firms: Note: 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 Contribution Per Unit Margin Fixed Costs Operating Income (Loss) Firm A 10,400 $ 21.00 $ 111,700 $ 41,500 Firm B 7,500 19.00 63,900 32,830 Firm C 7.60 4.20 10,600 (6,870) Firm D 5,150 46.00 40,060 48,500