I need help answering the following question:

The following information is available for the Foster Co.

Product Selling Price: $90

Variable Cost Per Unit: $43

Monthly Fixed Costs: $365,000

Tax Rate: 30%

Required:

1. Calculate the contribution margin.

2. Calculate the contribution margin ratio.

3. Calculate the break-even point in units.

4. Calculate the break-even point in dollars.

5. Calculate the sales in units required to produce an after tax income of $20,000.

6. Calculate the sales in dollars required to produce an after tax income of $20,000.

7. Calculate the margin of safety if the expected sales for the month are $800,000.