AirtelTigo Ghana is considering whether to lease or purchase some specialized equipment. The equipment has a seven-year useful economic life and is a Class 43 asset, which has a CCA rate of 20%. The equipment's resale value is zero, the marginal tax rate is 25%, and the firm's before-tax cost of borrowing is 10%. The equipment costs $600,000 if purchased or it can be leased for seven years at $85,000 per year. The first lease payment is payable in advance. Should AirtelTigo lease or buy the equipment?