Melanie and Jake are going to give away a king-sized candy bar if the player hits gray, a fun sized Snickers if they hit black and a dum dum if they hit white. They determine that a king-sized candy bar will cost them $1 a piece, a fun sized Snickers costs them $0.25 a piece, and a dum dum costs them $0.05 a piece. If they are charging $1 to play their game what is their expected profit per play?