A dollar fifty

We were in Costco the other day and waiting for my mom and sister. Dallas all of a sudden said that he found a dollar (Of course I thought a loonie) under my shoe - so he picked it up and it was a $50 dollar bill! So he called it his 'dollar fifty'. There was no one else really around - but we did check around to see if someone lost any bills and no one did - so Dallas got $50. He was upset later to find out that we spent it buying Darth Vader pajamas and pyrate lego! So to appease him I gave him Canadian Tire Money - 10 cents (because it is red) and a 50 cents one = his dollar fifty.