How to make a box from a bigger box (boxlings)

I tried shipping something today in a used Dell box that someone left in a conference room. It had tape on it that said “if this seal is broken, inspect contents before accepting”. At the mention of breaking a seal, I stopped on my way back and used the bathroom.

I went back to my office and placed my item in the box, taped it up, slapped on my shipping label and went to the post office. The lady behind the counter said she wouldn’t take it because I already broke the seal (I think a little pee may have slipped out).

I went back and searched all three floors that we occupy and finally conned IT to giving me another box (Amazon, not Dell). The problem was it was too big. So I lit a candle, put on some Barry Manilow, and channeled my inner MacGyver. I managed to cut and fold the box into the right size (although none of the corners are a true square). Four layers of tape later, I was done. I reslapped on my shipping label and trotted down to the post office to show off what I made during arts and craft time. Too bad they were closed for lunch.