Final answer:
Katie's gross pay with commission for last week was $687.80.
Step-by-step explanation:
To calculate Katie's gross pay with commission, we need to calculate the commission she earned from selling masks and add it to her gross wages. Katie sold 284 masks, and she earned a commission of $0.45 per mask sold. So, her commission can be calculated as 284 × $0.45 = $127.80.
To find Katie's gross pay with commission, we need to add her commission to her gross wages. Her gross wages were $560, so her gross pay with commission is $560 + $127.80 = $687.80.
Therefore, Katie's gross pay with commission for last week was $687.80.