Bikes Manufacturing produces and sells childrens bikes at an average price of $80. Its costs are as follows: direct materials, $10; direct labour, $6; variable overhead, $2; sales commission, 5% of price. Its fixed monthly costs are $35,000.

Required:

1.	Using the above cost data, set up a monthly cost equation.
	y= + X

2.	What is the companys contribution margin percentage? (Round your answer to 2 decimal places.)
	contribution margin= %