(A woman comes up and gives me $2 for her daughter to print. With our computers, you need to have money in your account in order to print. The daughter prints something, then tries to print again. The mother comes up twice, complaining that nothing is coming out and that something is wrong.)

Me: “How much is it saying it will cost?”

Patron: “We have enough.”

Me: “Okay, then it should print.”

Patron: “It’s saying it’s printing, but nothing is coming out.”

(I go over and try to print it. They don’t have enough.)

Me: “You need to put more money on the card.”

Patron: “Why?!”

Me: “The prints costs more than you have on there.”

Patron: “But she only printed once.”

Me: “This new print costs $1.50. She already spent at least $0.70, from what I can see. You only gave me $2.”

Patron: “So?”

Me: “So $2 minus $0.70 is less than $1.50.”

Patron: “I don’t get it.”

Me: “You need to give me more money for the prints.”

Patron: “But why?!”

Related:
Some Things Just Don’t Add Up, Part 5
Some Things Just Don’t Add Up, Part 4
Some Things Just Don’t Add Up, Part 3
Some Things Just Don’t Add Up, Part 2
Some Things Just Don’t Add Up