If she put $20 in the cash register, but only $15 of gas was pumped, cash register should show up as being over $5 for her shift unless she pocketed the $5. Now, Gracie strikes me as one of the most honest humans alive so I can't imagine that being the case. I am not trying to be argumentative.
I agree completely, all money has to go in the register....
I would think she put the entire $20 in, and had no way of knowing if the purchase was only $15 but, you don't get to take the $5.00 out and put in your pocket.
It still belongs to the store.
Besides, he wasn't there anyway !!