To calculate Chase's commission, you can use the formula:
\[ \text{Commission} = \text{Sale Price} \times \text{Commission Rate} \]
In this case, the sale price is $405 and the commission rate is 15%, which can be expressed as a decimal (0.15).
Now, plug in the values:
\[ \text{Commission} = 405 \times 0.15 \]
Calculating this:
\[ \text{Commission} = 405 \times 0.15 = 60.75 \]
Chase earned a commission of $60.75.