We are evaluating a project that costs $956,000, has a four-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 88,400 units per year. Price per unit is $34.95, variable cost per unit is $21.20, and fixed costs are $764,000 per year. The tax rate is 40 percent, and we require a return of 13 percent on this project. Required: 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.