The girls father was giving out snickers to the kids that came to their door, but by the time trick-or-treating was finished, he had a lot left over. Grace took ½ of the snickers that were left in the big dish, and passed the dish to Sophia. Sophia took ⅓ of the remaining snickers and passed the dish to Ella. Ella then took ¼ of the licorice that remained and passed the dish to her father who ate the last 12 snickers. How many snickers did Grace take?