霖 Part of Lummy 迷

I helped my customer to change his US dollar. As usual, i showed the estimated figure with the calculator to customers. $US * 3.4 = Ringgit Malaysia. So he pass me $200 and i quickly ran up to the money changer. *tik tik tak tak* then the receipt printed out $200 * 4.48 = RM 896 ....... I juz grab the cash and leave. When i passed the money to the customer, both of us start to suspect then only realize the money changer use the wrong rate and ended up the customer get extra RM 200++