You're trying to determine whether to expand your business by building a new manufacturing plant. The plant has an installation cost of $11.6 million, which will be depreciated straight-line to zero over its four-year life. If the plant has projected net income of $1,814,300, $1,867,600, $1,836,000, and $1,289,500 over these four years, what is the project's average accounting return (AAR)?