You're 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 $1,754,000, $1,820,500, $1,716,300, and $1,097,400 over these four years, what is the project's average accounting return (AAR)?