Solve please.

Lifet Products sells running shoes and shorts. The following is selected per-unit information for these two products. shoes Shorts Sales price $ 50 $ 5 Variable costs and expenses 35 1 Contribution margin 3 15 $ 4 Fixed costs and expenses amount to $378,000 per month. Lifet has total sales of $1 million per month, of which 80 percent result from the sale of running shoes and the other 20 percent from the sale of shorts. Required: a. Compute separately the contribution margin ratio for each line of products. b. Assuming the current sales mix, compute: 1. Average contribution margin ratio of total monthly sales. 2. Monthly operating income. 3. The monthly break-even sales volume (stated in dollars). c. Assume that through aggressive marketing Lifefit is able to shift its sales mix toward more sales of shorts. Total sales remain $1 million per month, but now 30 percent of this revenue stems from sales of shorts. Using this new sales mix, compute: 1. Average contribution margin ratio of total monthly sales. 2. Monthly operating income. 3. The monthly break-even sales volume (stated in dollars). Contribution Margin Ratio for shoes -' Contribution Margin Ratio for shorts -:l Average contribution margin ratio Operating income Break even dollars sales volume Average contribution margin ratio Operating Income 3' Break even dollars sales volume