The Handy Doll manufacturing Company has the following information: The average doll sale price is $12, raw materials for a doll are $4 and it takes 15 minutes to assemble a doll. Production labor is paid $8 per hour. Operating expenses are as follows : salaries$2,500 per week , insurance ,$1,200 per quarter, rent $1,500 per month: and utilities ,$800 per month. Hoe many dolls must be sold per month to break even? How many dolllars in sales does this represent? What is the contribution margin for each doll sold?