Dierks Bentley Tools Co. is considering investing in a specialized equipment costing $800,000. The equipment has a useful life of 5 years and a residual value of $100,000. Depreciation is calculated using the straight-line method. The expected net cash inflows from the investment are given below:

Year 1	$200,000
2	250,000
3	150,000
4	45,000
5	35,000
	$680,000

What is the accounting rate of return on the investment?