Answer:
5 years
Explanation:
Initial Cost = New Equipment Purchase Price - Salvage value of Old Equipment
Initial Cost = $240,000 - $40,000
Initial Cost = $200,000
Net Annual cash Flows = Annual savings - Annual costs
Net Annual cash Flows = $60,000 - $20,000
Net Annual cash Flows = $40,000
Pay back period = Initial cost / Net Annual Cash flows
Pay back period = $200,000/$40,000
Pay back period = 5 years