what is the payback period for the previpus assignment that i posted.

i posted the problem in my previous post. these 2 questions are related.

Nick's Novelties, Incorporated, is considering the purchase of new electronic games to place in its amusement houses. The games would cost a total of $475,000, have a fifteen-year useful life, and have a total salvage value of $47,500. The company estimates that annual revenues and expenses associated with the games would be as follows: Revenues $240,000

Less operating expenses:

Commissions to amusement houses: $70,000

Insurance = $45,000

Depreciation = $28,000

Maintenance = $30,000

Net operating income ($ 240,000 173,500)= $ 66,500