Pizza

During lunch break, school houses sold pizza, $1.50 per slice. It was a total rip off. First i bought one, 20 minutes later I saw my friend walking around with the pizza box and some of my other friends ran to him to buy some. He say "just give me your small changes", and my other friend gave him 5 cents and he get a slice, im like wtf. I payed $1.50 and now the price gone down to 5 cents. Next time I rather wait till the price go down only I buy. Only way to save money.