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) 23.00 $ 100,100 $ Firm A Firm B 12,000 $ 8,600 42,800 64,000 17.00 33,140 (6,330) Firm C 7.80 4.20 10,600 41,140 Firm D 4,980 52.00 48,880