Instructions: In this task, you are given a Reddit post as a text. Your task is to generate a title for this text. The title should start with "TIFU by", followed by a situation that caused humor. The title should contain 7-12 words, ideally.
Input: Text: my wife found a book of sewing patterns on amazon that she wanted to buy.  she then proceeded to ask me to order it for her as is normal.

the book is an "add-on" item, amazon's stupid program that prevents you from buying certain stuff unless you buy more, different stuff.  i'll be damned if i am going to buy something i don't want just to buy this book, so i consider an alternate option.  the game is to order something else that is a pre-order; they'll ship the add-on item right away, and then you can go an cancel the pre-order object.

i already had an outstanding pre-order for the star trek: tng season 7 blu-ray.  i placed that pre-order back in september at $90.99.  what i thought i'd do is just cancel this order first, then place a new order for the book and the star trek, so i'd be back to where i was.

after i placed the order, i saw my receipt had star trek listed for $116.99.  "huh?  oh, no!  no no no no no no!"

they raised the price since i placed my first order by $26 and i hadn't bothered to look at it again.  if i never cancelled my order, they would have still only charged me $90.99 because that was the price it was when i placed the order.
Output:
TIFU by trying to manipulate Amazon