MacCloud Industries has two divisions-Standard and Premium. Each division has hundreds of different types of tennis racquets and tennis products. The following information is available:

Standard Division Premium Division Total
Sales $400000 $600000 $1000000
Variable costs $340000 420000
Contribution margin $60000 $180000
Total fixed costs $300000

Required:
a. What is the weighted-average contribution margin ratio?
b. What is the break-even point in dollars?