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.)

Principal (Value of Stock)	Commission
Under $3,000	$32plus+1.8% of principal
$3,000 - $10,000	$56plus+1.% of principal
Over $10,000	$106plus+0.5% of principal

An investor purchases 328 shares at $36.66 a share, holds the stock for 271 days, and then sells the stock for $52.27 a share. Assume a 360-day year.

What is the rate of annual %? Round to nearest three decimal place.