Fairfield Bicycle Shop sells Mountain bikes, Dirt bikes and Leisure bikes. D. Shim, owner, aggregated the following information with help of CSUCI Accounting consulting: The shop anticipates selling 600 Mountain bikes, 250 Dirt bikes and 150 Leisure bikes. Monthly common fixed costs which can't be separated to any product are $300,000 and income tax rate is 40%. Required) 1. What is unit contribution margin and sales mix for Mountain bike, Dirt bike and Leisure bike? 2. What is shop's break-even sales volume in dollars and in units for each product? 3. How many bicycles of each type must be sold to earn after tax profit of $120,000