Whats my daughters age?

A man, for reference sake called Bob was talking to his secretary who again for reference sake shall be called Shirley about his three daughters. He tells her she gets a raise if she can tell him their ages. The clues he gives her are as follows... Their ages multiply together to equal 36, and they add up to be the first two digits in his license plate. Shirley knows the license plate number ... you do not. She then , after careful deliberation tells him the she needs more information to solve this tricky riddle. He agrees and states simply, "My oldest daughter likes strawberry ice cream." Immediately Shirley sais, "ah hah!" ... She has found their ages ... can you?