First, let's turn 7% into a decimal by moving the decimal point two places to the left.
7% = .07
Now, multiply it by the amount of sales, because commission is money based on, well, sales.
4500 * .07 = 315
Add the commision to the sales.
4500 + 315 = 4815
Add the weekly salary to the current price.
370 + 4815 = 5185
With commission and her initial weekly salary, Mae Ling earned $5185.
