Calculate the missing amounts for each of the following firms: (Do not round intermediate calculations.) 8 Sales Variable Costs Fixed Costs $ 320,000 Operating Income (Loss) $ 35.329 73,072 464.000 Contribution Margin Ratio 33% % 30 % 23 % Fimm A Fim Firm C Firm D X 01:35:53 115,000 35,100 131,000 Skipped 59,000 (4,940) eBook