jt engineering wants to buy a machine that costs $158,000, has a 20-year life, and has a $12,000 salvage value. annual inflows are $66,000 and annual outflows are $41,000. jt requires 14% return, which has an annuity present value factor of 6.6231 and a single future amount present value factor of 0.0728. what is the net present value (npv)