Use the commission schedule from Company B shown in the table to find the annual rate of interest earned on the

investment. $($Note: commisions are rounded to the nearest cent.$)$

An investor purchases $431$ shares at $$36\mathrm{.}55$ a share, holds the stock for $340$ days, and then sells the stock for $$49\mathrm{.}64$ a share. Assume a $360-$day year.

The annual rate of interest is i$.($Round to three decimal places.$)$