You invest $$4500$ in a stock at the beginning of the year. By the end of the year, the stock price has increased to $$3100.$ In the middle of the year, the stock also paid a dividend of $$800,$ which you invested in $6-$month Treasury bills that earned a $9\%$ semiannual interest rate by the end of the year. What is the total return on your investment over the year? Please report the decimal number instead of using $"\%"$ and keep three decimal places like $0\mathrm{.}280.$