Take the money and act like it was yours when your mother asks you where it came from, and spend it on something for yourself to use.
You tell your mother about the problem and your teachers and principal and ask them what to do with it.
You tell everyone you found 50 dollars and then you say that you beat up a pirate to get it.
You tell your mom it was a mistake and you will tell your teacher and you end up spending it on a clown costume to show to your teacher.
Tell your mom what you really want to be but you tell her that her costume she picked out for you was a good idea but you thought of something before hand.
You say to your mom that she has to go take it back and get a smaller size because it is too big so you hurry up and get a job at the place she is returning it too and get the money and spend it on a costume you really want.
You tell your mom the idea is stupid and you dont even like Halloween because you think trick or treating is stupid also and you only like scaring little kids that come to your house by hiding under a bush and poping out as a monster
You tell your mom its a great idea and wear it around school with confidence saying "Hey everybody look at me I'm (Baby Bop) or (Barney)
Pick the can up and drink it with all the bugs in it.
You tell everyone your not afraid to pick the can up so you pick the can up and throw it and scream to make everyone laugh.
You see the can but you dont care and keep walking because you dont want to pick anything up so your bag is empty even though you say 10 pieces of trash already.
You take a paper towel you brought that was in your first aid kit because if someone was hurt and pick up the can with the paper towel and put it in your bag along with the other 20 items