a. Purchase the machine it is currently renting for $160,000. This machine will require $23,000 per year in ongoing maintenance expenses. spent up front to train the new operators of the machine. The NPV of renting the current machine is $ (Round to the nearest dollar.) a. Purchase the machine it is currently renting for $160,000. This machine will require $23,000 per year in ongoing maintenance expenses. spent up front to train the new operators of the machine. The NPV of renting the current machine is $ (Round to the nearest dollar.)