Calculating AAR Youre trying to determine whether to expand your business by building a new manufacturing plant. The plant has an installation cost of 15 million, which will be depreciated straight-line to zero over its four-year life. If the plant has projected net income of 1,938,200, 2,201,600, 1,876,000 and 1,329,500 over these four years, what is the projects average accounting return (AAR)