Final answer:
It is typically false that a customer should receive cash back when using a gift card, as the remaining balance usually stays on the card for future use, unless the store's policy allows cash back.
Step-by-step explanation:
The question pertains to whether a customer should receive cash back when using a gift card. When a customer makes a purchase of $20.21 with a $25 SmartCash gift card, the remaining balance on the card would be $4.79.
Generally, the balance would stay on the card for future purchases, and cash back is not granted when using gift cards unless the store's policy specifically allows it. Therefore, the answer is False; it is not okay to give her $4.79 in change unless the store policy says otherwise.