PLEASE SHOW HOW TO SOLVE IN EXCEL WITH ALL THE STEPS

1. Suppose a project has NINV of $650,000. Of this, only $460,000 is depreciable and can be depreciated straight-line over 10 years. After 7 years of this, however, you sell a machine that was part of that depreciable asset group for $40,000. At the time of sell, the machine still had $15,000 of remaining book value. If your tax rate is 21%, what is the tax ramification of the machine sell?
   1. A tax savings of 21,840
   2. A tax bill of $20,580
   3. A tax bill of $5,250

A tax savings of $4,380