Century Lab uses straight-line depreciation for its machines. -end except for in 1. Calculate net present value. 2. Calculate internal rate of return. 3. Calculate accrual accounting rate of return based on net initial investment. 4. Calculate accrual accounting rate of return based on average investment 5. You have the authority to make the purchase decision. Why might you be reluctar sion on the DCF methods? Century Lab uses straight-line depreciation for its machines. -end except for in 1. Calculate net present value. 2. Calculate internal rate of return. 3. Calculate accrual accounting rate of return based on net initial investment. 4. Calculate accrual accounting rate of return based on average investment 5. You have the authority to make the purchase decision. Why might you be reluctar sion on the DCF methods