Grades
Calvin: I've got an idea, Dad
Calvin: Maybe I'd get better grades if you offered me $1 for every "D"; $5 for every "C", $10 for every "B", and $50 for every "A"!
Dad: I'm not going to bribe you Calvin. You should apply yourself for your own good.
Calvin: Rats. I thought I could make an easy 4 bucks.