In other words: the number on the price tag explained.

When I was little, I was taught from a very early age the value of honesty and truth. My parents never punished me for telling the truth even when I did really bad things like that time when I was 7 and ate the sandwich with Nutella that belonged to my classmate (hey! Before you judge me, I was raised in communist Poland where vinegar and vodka were the only things available in the shops and my colleague had a father who worked in Germany).