How do I answer these questions in managerial accounting?

In's Bicycle Shop sells 21 - speed bicycles. For purposes of a cost- volume_profit analysis, the shop owner Has divided sales into two ategories . as follows : Sales Price\\ Invoice Sales Product Type Cost Comma = $ 1 on High - quality $ 1 , 858 6.840 $ 10 0 Medium- quality 920 62 8 40 Three -quarters of the shop's sales are medium -quality bikes. The shop's annual fixed expenses are $2 /0 400'n the following requirements , ignore income taxes . !` Required :" 1 . Compute the unit contribution margin for each product type 2. What is the shop's sales mix ? 3 . Compute the weighted-average unit contribution margin , assuming a constant sales mix. 4 . What is the shop's break - even sales volume in dollars ? Assume a constant sales mix* 5 . How many bicycles of each type must be sold to earn a target net income of $126 7 50 ? Assume a constant sales mix