I've kept posting like 4th times, but no one gets right answers, can someone please give me a help! thanks a lot. I don't want to waste my question anymore

Problem 11-19 Project Analysis [LO1, 2, 3, 4] You are considering a new product launch. The project will cost $2,350,000, have a four- year life, and have no salvage value; depreciation is straight-line to zero. Sales are projected at 330 units per year, price per unit will be $19,600, variable cost per unit will be $14,000, and fixed costs will be $720,000 per year. The required return on the project is 10 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.) Unit Sales Scenario Base Best Worst Variable Cost Fixed Costs NPV 330 S 14,000 $ 720,000 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 d-1. What is the accounting break-even level of output for this project? (Do not round d-2. What is the degree of operating leverage at the accounting break-even point? (Do round intermediate calculations and round your answer to 2 decimal places, e.g. 32.16.) intermediate calculations and round your answer to 2 decimal places, e.g, 32.16.) not round intermediate calculations and round your answer to 3 decimal places, e.g., 32.161.) c. Cash break-even d-1. Accounting break-even d-2. Degree of operating leverage