Dominic's Deli recently calculated its annual break-even sales revenue to be $280,000. For each dollar of sales revenue, $0.40 goes to cover variable costs. a. Compute the contribution margin ratio. b. Compute the total fixed costs. c. Compute the sales revenue that would have to be generated to earn an operating income of $144,000. a. Contribution margin ratio b. Total fixed costs c. Sales revenue %