Saved Calculate the missing amounts for each of the following firms: (Do not round intermediate calculations. Round "Selling "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 11,100 $ 28.00 $ 107,000 $ 66,600 Firm B 8,100 18.00 Firm C 7.30 40.400 66,200 17.120 51,610 99,440 10,200 42,490 4.10 33,240 (6,920) (9,120) Firm D 4,190 47.00