Commission Use the commission schedule from Company A shown in the table to find the annual rate of interest earned on the investment. (Note: commissions are rounded to the nearest cent.) Principal (Value of Stock) Under $3,000 $3,000 to $10,000 $25 + 1.8% of principal $37+ 1.4% of principal $107 + 0.7% of principal Over $10,000 The annual rate is %. (Round to five decimal places.) An investor purchases 411 shares at $9.82 a share, holds the stock for 36 weeks, and then sells the stock for $19.22 a share. The annual rate is % (Round to five decimal places.)