The average unit cost at a monthly volume of 9,000 units is $3, and the average unit cost at a monthly volume of 22,500 units is $2.10.

Required:

A. Develop an equation for total monthly costs. If required, round your answer to two decimal places.

Total monthly costs	=	Fixed costs per month	+	Variable cost
	=	$( )	+	($( ) per unit X number of units)

B. What are the total monthly costs if 15,000 units are produced? $( )