McGilla Golf is evaluating a new line of golf clubs. The clubs will sell for $$920$ per set and have a variable cost of $$410$ per set. The company has spent $$137,500$ for a marketing study that determined the company will sell $46,500$ sets per year for seven years. The marketing study also determined that the company will lose sales of $8,700$ sets of its high$-$priced clubs. The high$-$priced clubs sell at $$1,420$ and have variable costs of $$550.$ The company also will increase sales of its cheap clubs by $11,300$ sets. The cheap clubs sell for $$410$ and have variable costs of $$140$ per set. The fixed costs each year will be $$9,250,000.$ The company has also spent $$975,000$ on research and development for the new clubs. The plant and equipment required will cost $$28,350,000$ and will be depreciated on a straight$-$line basis to a zero salvage value. The new clubs will also require an increase in net working capital of $$2,290,000$ that will be returned at the end of the project. The tax rate is $24$ percent, and the cost of capital is $15$ percent.

Suppose you feel that the values are accurate to within only $\backslash$pm $10$ percent. What are the best$-$case and worst$-$case NPVs$?($Hint: The price and variable costs for the two existing sets of clubs are known with certainty; only the sales gained or lost are uncertain.$)$