Calculate the missing amounts for each of the following firms: (Do not round intermediate calculations. Round "Selling Price" to 2 decimal places. Enter any negative amount with a minus sign.) Variable Costs Per Unit Contribution Margin Fixed Costs Operating Income (Loss) Units Sold Selling Price 10,000 $ 25.00 9,000 700 $ Firm A Firm B Firm C 100 000 $ 40.000 66,000 19.00 4.00 50.00 33,000 (6.000) 12 000 40.000 Firm D 4,000 48,000 Backus Inc, makes and sells many consumer products. The firm's average contribution margin ratio is 35%. Management is considering adding a new product that will require an additional $15,000 per month of fixed expenses and will have variable expenses of $7.80 per unit. Required: a. Calculate the selling price that will be required for the new product if it is to have a contribution margin ratio equal to 35%. b. Calculate the number of units of the new product that would have to be sold if the new product is to increase the firm's monthly operating income by $6,000. (Do not round intermediate calculations.) A per unit a b Selling price Number of units