Problem $10-12$ Break$-$even analysis

Modern Artifacts can produce keepsakes that will be sold for $$200$ each. Nondepreciation fixed costs are $$3,400$ per year, and variable costs are $$180$ per unit. The initial investment of $$9,000$ will be depreciated straight$-$line over its useful life of five years to a final value of zero, and the discount rate is $10\%.$

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

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

Note: Do not round intermediate calculations. Round your final answer to the nearest whole number.

c$.$ What is the accounting break$-$even level of sales if the firm's tax rate is $20\%?$

d$.$ What is the NPV break$-$even level of sales if the firm's tax rate is $20\%?$

Note: Do not round intermediate calculations. Round your final answer to the$]$nearest whole number.

e$.$ 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 $20\%?$

Note: Round intermediate calculation to the nearest whole number. Round your answers to $2$ decimal places.