4. Summit Corp is considering the purchase of a new piece of equipment. The cost savings from the equipment would result in an annual increase in net income after tax of S100,000. The equipment will have an initial cost of S400,000 and have a 7 year life. If the salvage value of the equipment is estimated to be $75,000, what is the accounting rate of return? A. 14.28% B. 25.00% C. 42.11% D. 147.37%