Modern Artifacts can produce keepsakes that will be sold for $120 each. Nondepreciation fixed costs are $1,800 per year and variable costs are $100 per unit. The initial investment of $5,000 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? (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%? (Do not round intermediate calculations. Round your final answer to the nearest whole number.) units units a. Accounting break-even level of sales b. NPV break-even level of sales c. Accounting break-even level of sales d. NPV break-even level of sales units units