how is this 8.48???

Dartis Tools Co. is considering investing in a specialized equipment costing $600,000. The equipment has a useful life of 5 years and a residual value of $60,000. Depreciation is calculated using the straight-line method. The expected net cash inflows from the investment are given below: 3. Year 1 $200,000 150,000 160,000 95,000 What is the accounting rate of return on the investment