1. An investor purchases 400 shares at $21.40 a share, holds the
stock for 30 weeks, and then sells the stock for $24.60 a share.
Use the commission schedule below from Company A to find the annual
rate of interest earned by the investment.
Company A
Principal
Under $3,000
$3,000-$10,000
Over $10,000
Commission
$25 + 1.8% of principal
$37 + 1.4% of principal
$107 + 0.7% of principal
2. Find the annual percentage yield (APY) for money invested at
an...