1. **State the problem:** We are given the stock symbol MSLV with a market close price of $2.21, last sale price after hours of $2.60, and share volume of 500 shares. We need to find: (a) The total cost of buying 500 shares at the market close price. (b) The return for the day based on the change in price. (c) The percent return for the day. 2. **Formulas and rules:** - Total cost = Number of shares $ \times $ Purchase price per share. - Return = Number of shares $ \times $ (Last sale price - Market close price). - Percent return = $ \frac{\text{Return}}{\text{Total cost}} \times 100 \% $. 3. **Calculate total cost:** $$\text{Total cost} = 500 \times 2.21 = 1105$$ 4. **Calculate return:** $$\text{Return} = 500 \times (2.60 - 2.21) = 500 \times 0.39 = 195$$ 5. **Calculate percent return:** $$\text{Percent return} = \frac{195}{1105} \times 100 = \frac{\cancel{195}}{\cancel{1105}} \times 100 \approx 17.6\%$$ **Final answers:** (a) Total cost = 1105 (b) Return = 195 (c) Percent return = 17.6%