(Ignore income taxes in this problem.) Beaver Company is investigating the purchase of a new threading machine that costs $18,000. The machine would save about $4,000 per year over the present method of threading component parts, and would have a salvage value of about $3,000 in 6 years when the machine would be replaced. The company's required rate of return is 12%. The machine's net present value is: 1) $1,556. 2) ($35). 3) $11,000. 4) $8,000. show work please present value of Annuity is 4.111 if needed