Dinshaw Company is considering the purchase of a new machine. The invoice price of the machine is $78,939, freight charges are estimated to be $2,590, and installation costs are expected to be $7,690. The annual cost savings are expected to be $14,520 for 10 years. The firm requires a 21% rate of return. Ignore income taxes. What is the internal rate of return on this investment? (Round answer to O decimal places, e.g. 15%.) Click here to view PV table. Internal rate of return %