Muscle Beach, Inc., makes three models of high-performance weight-training benches. Current operating data are summarized here:

	MegaMuscle			PowerGym			ProForce
Selling price per unit	$	170		$	220		$	310
Contribution margin per unit		51			77			62
Monthly sales volumeunits		4,000			3,000			1,000
Fixed expenses per month			Total of $468,000

a. Calculate the contribution margin ratio of each product.

b. Calculate the firm's overall contribution margin ratio. (Round your answer to 1 decimal place.)

c. Calculate the firm's monthly break-even point in sales dollars. (Round your intermediate calculations to 1 decimal place.)

d. Calculate the firm's monthly operating income.

e-1. Management is considering the elimination of the ProForce model due to its low sales volume and low contribution margin ratio. As a result, total fixed expenses can be reduced to $420,000 per month. Assuming that this change would not affect the other models, what would be the effect on net operating income.

f-1. Assume the same facts as in requirement e. Assume also that the sales volume for the PowerGym model will increase by 500 units per month if the ProForce model is eliminated. What would be the effect on operating income.