We are evaluating a project that costs $$983,000,$ has a life of eleven years, and has no salvage value. Assume that depreciation is straight$-$line to zero over the life of the project. Sales are projected at $141,000$ units per year. Price per unit is $$39,$ variable cost per unit is $$28,$ and fixed costs are $$993,813$ per year. The tax rate is $23$ percent, and we require a return of $15$ percent$$on this project. The projections given for price, quantity, variable costs, and fixed costs are all accurate to within $+/-18$ percent. $$ a$.$ Calculate the best$-$case NPV$.$ b$.$ Calculate the worst$-$case NPV$.$