The Ogi Corporation, a construction company, purchased a used pickup truck for $22,000 and used MACRS depreciation in the income tax return. During the time the company had the truck, they estimated that it saved $8,000 a year. At the end of 4 years, Ogi sold the truck for $5,000. The combined federal and state income tax rate for Ogi is 30%. Compute the after-tax rate of return for the truck.