You are going to open a business making white boards. You can sell each board for $40. It takes a board maker approximately 60 minutes to make one board. each board maker works an 8-hours day, earning $20. per hour. each board will use $12 in raw materials. You usually produce boards 22 days a month and can employ 2 board makers. You estimate that your fixed costs are $2500 per month. a. what is your contribution margin? b. how many boards must you make each month to break even? c. What is your total monthly revenue if you want to earn a $1000 profit?