An investor purchases 450 shares at $21.40 a share, holds the stock for 26 weeks, and then sells the stock for $24.60 a share.
Use the commission schedule from Company B shown in Table 3 to find the annual rate of interest earned by each investment in Problems 61 and 62.

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Table 3 Company B Principal Under $3,000 $3,000-$10,000 Over $10,000 Commission $32 + 1.8% of principal $56 + 1% of principal $106 + 0.5% of principal