please show ALL work

1. A company produces a single product to sell for $6.00 per unit. The company incurs $18.000 in fixed costs, and variable costs run $3.00 per unit. The company has a tax rate of 40%

a. Compute the contribution margin per unit

b. Compute the break-even point in units

c. Compute the break-even point in dollars

d. Compute the target units assuming management would like a before tax profit of $15.000

e. Compute the target units assuming management would like an after tax profit of $15.000

f. Compute the contribution margin ratio

g. Compute the total sales necessary to produce an after-tax profit of $15,000