We are evaluating a project that costs $604,000, has an 8-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 55,000 units per year. Price per unit is $36, variable cost per unit is $17, and fixed costs are $685,000 per year. The tax rate is 21 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 10 percent. Calculate the best-case and worst-case NPV figures.