Help please :)

You are considering a new product launch. The project will cost $875,000, have a four-year life, and have no salvage value; depreciation is straight-line to zero. Sales are projected at 190 units per year; price per unit will be $19,200, variable cost per unit will be $15,100, and fixed costs will be $345,000 per year. The required return on the project is 11 percent, and the relevant tax rate is 35 percent. Requirement 1: Based on your experience, you think the unit sales, variable cost, and fixed cost projections given here are probably accurate to within plusminus 10 percent. (a) What are the best and worst case NPVs with these projections? (Do not round intermediate calculations. Negative amounts should be indicated by a minus sign. Round your answers to 2 decimal places (e.g., 32.16).) (b) What is the base-case NPV? (Do not round intermediate calculations. Round your answer to 2 decimal places (e.g., 32.16).) Requirement 2: What is the sensitivity of the NPV to changes in fixed costs? (Do not round intermediate calculations. Input the amount as a positive value. Round your answer to 2 decimal places (e.g., 32.16).)