toss a pair of dice. if either die is a "one", you loose all your money. If not you win the amount that equals the sum of the faces. This is added to...

toss a pair of dice. if either die is a "one", you loose all your money. If not you win the amount that equals the sum of the faces. This is added to your total. After any toss, you may quit or you may continue. What is the "best strategy" that gives you the largest expected value? Is it "one toss", "two tosses". three tosses",......etc. Justify your answer by showing all steps in reaching your solution.