Suzanne and Kerry entered into a financial agreement. On January 1, 2014, Suzanne gave $8400 to Kerry.
On April 1, 2014, Kerry repaid $2800 to Suzanne.
On July 1, 2014, Kerry repaid $3360 to Suzanne, and Suzanne immediately place half of this payment into an account at Harlow Savings and Loan which earns at effective monthly compound interest rate of 0.8%
Finally, on January 1, 2015, Kerry gave Suzanne $2800 to completely repay the loan. At the same time, Suzanne closed her account at Harlow Savings and Loan and withdrew the money in the account.
What is Suzanne's dollar-weighted rate of return in this financial agreement, assuming simple interest for the rate of return? (Round your answer to four places after the decimal)