John's Auto Detailers is trying to decide whether to lease or buy some new equipment for polishing vehicles. The equipment costs $22,000, has a 3-year life, and will be worthless after the 3 years. The after-tax discount rate is 6.2 percent. The annual depreciation tax shield is $1,760 and the after-tax annual lease payment is $6,800. What is the net advantage of leasing?