Please explain as well.

Problem 6.40A a-b,d The Peace Barber Shop employs four barbers. One barber, who also serves as the manager, is paid a salary of $1,800 per month. The other barbers are paid $1,330 per month. In addition, each barber is paid a commission of $2 per haircut. Other monthly costs are as follows: store rent $790 plus 60 cents per haircut; depreciation on equipment $510; barber supplies 40 cents per haircut; utilities $350; and advertising $250. The price of a haircut is $13. Determine the variable cost per haircut and the total monthly fixed costs. (Round variable cost to 2 decimal places, e.g. 15.25.) Variable cost per haircut Total monthly fixed costs Calculate the break-even point in units and dollars. Break-even Point units Break-even Points Determine the operating income, assuming 1,500 haircuts are given in a month. Operating income