To find the commission, you can use the formula:
\[ \text{Commission} = \text{Sales} \times \text{Commission Rate} \]
In this case, the sales are $750, and the commission rate is 5% (or 0.05 as a decimal).
Now, calculate the commission:
\[ \text{Commission} = 750 \times 0.05 = 37.5 \]
Thus, the commission is 37.5.