Wanda invests 5400 dollars in a mutual fund on January 1. On June 1, her fund balance is 3600 dollars. Unfazed, she invests an additional 1100 dollars. On September 1, her fund balance is 8600 dollars. She then withdraws 1500 dollars. On the following January 1, her fund balance is 7100 dollars. What is Wanda's dollar-weighted rate of return? (Assume simple interest and months of equal length.)
Answer = percent.