Saren Millworks is contemplating the purchase of a new casting oven. The oven will cost $$52,000$ but will generate additional revenue of $$30,000$ per year for ten years. Additional costs, other than depreciation, will equal $$15,000$ per year. The oven has an expected life of ten years, at which time it is estimated to have a $$12,000$ residual value. Saren uses the straight$-$line method of depreciation. Determine the net present value of the investment if the required rate of return is $14\%$ and the tax rate is $40\%.$ Should Saren Millworks make the investment in the boiler?

a$.$ Compute NPV incorporating taxes

b$.$ Interpret this NPV in one sentence