Don't worry, be happy

As the song goes "Don't worry, be happy". Yeah, I'm happy my shift ended. All day, every single customer had to complain their original priced item was on sale. No correct price recited nor how much it should be off, they just know it was sale. Ok, call the section item is in and the clerk informs me item is not on sale. Now customers no longer want the item so I have a large pile of rejects. And the Most Annoying Customer Award goes to: The Immigrant Jerk who pretended not to speak English (Yeah, he knew what he was doing and what I saying) and refused to leave until he got his way. I wanted to push this a**wipe out the door. First he complains everything is wrongly priced when I scan them. First clue of a scam artist. Then I call back to item's department and the scanned price is correct. He argues further it is on sale. I repeat, "The clerk said the price is correct and I am not changing it". He goes back to the department and has a store clerk come up to the registers and force me to give me his desired price. Clerk tells me somewhere in the department there is a sign (not connected to the item he is buying) that says $12.99. Ok, fine, $12.99. Oh, wait, now he says its $9.99 and he wants it Buy One Get One Half Off from the new sale price. BOGO's are only done on original price, never from a sale price. But there is line building up behind him from all his arguing and this a**wipe is not leaving until he gets his way so break all the rules to get rid of him. Next he has a coupon too. Give him his receipt with a smile and help next person. I gave the lady behind him 10% off for her patience. And finally, help arrives to get rid of my long line. I bet you are happy not to work my job.