Guys, Read the damn question carefully. IT SAYS THE PRODUCT WOULD BE 36. AND ALSO THE WOMEN SAID MY "OLDEST" CHILD IS SLEEPING UPSTAIRS. LONELYinTMIDWEST, your answer for 3,3,4 CANNOT add up to 13. THE ANSWER I GAVE IT TO YOU GUYS IS THE ONLY RIGHT ANSWER. There is no flaw in the question. :-)