CVP; multiproduct Mel's Accessories sells wallets and money clips. Historically, the firm's sales have averaged three wallets for every money clip. Each wallet has an $8 contribution margin, and each money clip has a $6 contribution margin. Mel's incurs fixed cost in the amount of $216,000. The selling prices of wallets and money clips, respectively, are $30 and $15. The corporate-wide tax rate is 40 percent. a. How much revenue is needed to break even? $ How many wallets and money clips does this represent? wallets money clips b. How much revenue is needed to earn a pre-tax profit of $180,000? Note: Do not round until you determine the number of units of each product; round number of units to the next highest whole unit in your calculations. $ c. How much revenue is needed to earn an after-tax profit of $180,000? Note: Do not round until you determine the number of units of each product; round number of units to the next highest whole unit in your calculations. $ d. If Mel's earns the revenue determined in (b) but does so by selling five wallets for every two money clips, what would be the pre-tax profit (or loss)? Note: Do not round until you determine the number of units of each product; round number of units to the next highest whole unit in your calculations. $