Suppose that the expected value of weekly profits for an ice cream​ shop, before paying the​ manager, Amy, is ​E(pi​)equals500plus12​e, where e is​ Amy's weekly overtime hours. Amy is​ risk-neutral but incurs a cost ​C(e)equalse squared for working overtime.​ Thus, total expected surplus is ​E(S)equals​E(pi​)minus​C(e). What level of effort maximizes total​ surplus? The value of overtime that maximizes total surplus is eequals nothing hours. ​(Enter your response rounded to one decimal​ place.)