Modern Artifacts can produce keepsakes that will be sold for $230 each. Nondepreciation fixed costs are $4,000 per year, and variable costs are $210 per unit. The initial investment of $10,500 will be depreciated straight-line over its useful life of five years to a final value of zero, and the discount rate is 10%

. What is the accounting break-even level of sales if the firm pays no taxes?

What is the NPV break-even level of sales if the firm pays no taxes?

What is the accounting break-even level of sales if the firms tax rate is 20%?

What is the NPV break-even level of sales if the firms tax rate is 20%?

What is the degree of operating leverage for the firm for the NPV break-even points when the tax rate is 0% and when the tax rate is 20%?