I'm a bit torn between whether this is my lucky day or if I'm just being dishonest. I went to LV to buy a damier long tango and it came out to over $600. I had $400 in cash and was going to pay the rest on credit. Driving home, I I realized the SA rang me up as paid $500 in cash and the rest on my card. He miscounted the money. Should I go back and pay the rest of the $100? I'm feeling guilty. Or is this just my lucky day???