show all steps. Use a calculator not excel

We are evaluating a project that costs $768,000, has a six-year life, and has no salvage value. Assume that depreciation is straight-line to zero over the life of the project. Sales are projected at 57,000 units per year. Price per unit is $60, variable cost per unit is $35, and fixed costs are $770,000 per year. The tax rate is 35 percent, and we require a return of 15 percent on this project. Suppose the projections given for price, quantity, variable costs, and fixed costs are all accurate to within plusminus 10 percent. Calculate the best-case and worst-case NPV figures. (Negative amounts should be indicated by a minus sign. Do not round intermediate calculations and round your final answers to 2 decimal places, e.g., 32.16.)