Determining Sales fora Desired After$-$Tax Profit

Assume Dart Container Corp. produces $16-$ounce beverage containers. Further assume that

the company sells the cups for $$40$ per box of $50$ containers. Variable and fixed costs follow.

Suppose in September, the company produced and sold $3,000$ boxes of beverage containers.

REQUIRED

Assuming the company is subject to a $40\%$ income tax, determine the monthly unit sales

required to produce a monthly after$-$tax profit of $$7,200.$

Monthly unit sales: