Membership has its privileges

I was at the Dollar Tree tonight, picking up a few things, and used my debit card to pay for my purchases. Swiped the card and waited and waited. The cashier cleared out the "swipe" and had me do it again. Still didn't process. Did it one more time with the same result. Then she swiped the card and the card reader came back with the message "NOT AVAILABLE." The cashier said "As much as you're in here and use your card and it's telling you 'not available'? It ought to take your card the first time and say PREFERRED CUSTOMER!" Which gave me a much needed laugh after a very long day.