A slot machine in a casino is programmed so that the prizes are $10,$20 or $100. The probability of winning $100 in each play .001, for $20 it's .01, and for $10 it's .02. The casino is charging $1 for each play. If the cost of running the machine for each play is 15 cents (electricity, maintenance, etc.), on average how much is the casino profiting from each play?