please help me understand this and show all your work please.

thank you!

Racer must acquire $99,000 of new equipment if it reopens the plant. The equipment has a 6 -year service life, a $15,900 salvage value, and will be depreciated by the straight-line method. Repairs and maintenance are expected to average $7,100 per year in years 4-6, and the equipment will be sold at the end of its life. Required: Use the net-present-value method (total-cost approach) and a 20% hurdle rate to determine whether Racer should make or buy Part No. 76. Ignore income taxes. (Negative amounts should be indicated by a minus sign. Round your answers to the nearest dollar amount.)