Need to solve for the change in NPV / change in FC

You are considering a new product launch. The project will cost $1,975,000, have a four- year life, and have no salvage value; depreciation is straight-line to zero. Sales are projected at 220 units per year; price per unit will be $17,700, variable cost per unit will be $11,750, and fixed costs will be $570,000 per year. The required return on the project is 9 percent, and the relevant tax rate is 21 percent. a. Based on your experience, you think the unit sales, variable cost, and fixed cost projections given here are probably accurate to within +10 percent. What are the upper and lower bounds for these projections? What is the base-case NPV? What are the best-case and worst-case scenarios? (A negative answer should be indicated by a minus sign. Do not round intermediate calculations. Round your NPV answers to 2 decimal places, e.g., 32.16. Round your other answers to the nearest whole number, e.g. 32.) Scenario Fixed Costs NPV Base $ $ Unit Sales 220 242 198 Variable Cost $ 11,750 10,575 12,925 Best 570,000 513,000 27,000/ 252,299.32 1,460,965.91 -824,047.40) Worst 6 b. Evaluate the sensitivity of your base-case NPV to changes in fixed costs. (A negative answer should be indicated by a minus sign. Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.) C. What is the cash break-even level of output for this project (ignoring taxes)? (Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.) d-1. What is the accounting break-even level of output for this project? (Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.) d-2. What is the degree of operating leverage at the accounting break-even point? (Do not round intermediate calculations and round your answer to 3 decimal places, e.g., 32.161.) b. NPVFC c. Cash break-even 96.00 d-1. Accounting break-even d-2. Degree of operating leverage 179.00 2.150