Problem $3-17$A Determining the breakpoint and preparing a contribution margin income statement Ritchie Manufacturing Company makes a product that it sells for $$150$ per unit. The company incurs variable manufacturing costs of $$60$ per unitVariable selling expenses are $per unitannual fixed manufacturing costs are $ $480,000,$ and fixed selling and administrative are $$240,000$ per year Required Determine the breakeven point in units and dollars using each of the following approaches aUse the equation method bUse the contribution margin per unit approach Use the contribution margin ratio approach Confirm your results by preparing a contribution margin income statement for the break$-$even sales volume.