New job promotion! pay raise help!?

I am 20 yrs old working at a company that ive been with for about 3 months, i started as a seasonal worker but then was offered a spot a month later as a sales ociate because of my very high sales margin, just recently our store manager decided to call it quits and is leaving at the end of this upcoming week, they offered me a position immediately for a sales management position so that there are 3 managers in the store that can open and close. right now it is a temporary position for the time being but in other words they are puttin me up for the test of being lead sales manager, i am making $9.00 dollars an hour right now, and i am looking for at least a minimum of 11 dollars an hour as far as a raise goes, is it too much to ask for? i did some math and i believe every day that ive worked here so far i have brought in about 100-200 dollars for every hour ive worked for this company. i dont want to sound to expensive but i also dont want to be cheated out of a pay that suits my responsibilties here shortly.. any advice or input would be greatly appreciated! :)