Please show answer in excel with equations.

(15 Percent) A firm's products are sold for $80 each. The fixed costs (non-depreciation) are $1,000 per year, and the variable costs per unit are 70% of the selling price. The initial investment of $3,000 will be depreciated straight-line over its useful life of six years to a final value of zero, and the discount rate is 12%. The firm's tax rate is 30%. Calculate the NPV breakeven level of sales. (15 Percent) A firm's products are sold for $80 each. The fixed costs (non-depreciation) are $1,000 per year, and the variable costs per unit are 70% of the selling price. The initial investment of $3,000 will be depreciated straight-line over its useful life of six years to a final value of zero, and the discount rate is 12%. The firm's tax rate is 30%. Calculate the NPV breakeven level of sales