Wait in Line
Dr. Hong takes Leo, Isaac, and Kyle to the grocery store to buy some snacks for an upcoming CMM party. Each of them holds a shopping basket waiting at the cashier’s line to check out some party goods. It takes 10, 4, 6, 2 minutes Respectively to check out each of them. A cashier can check out one person at a time, the others who haven’t checked out must wait in line. Each person is counting his own waiting minutes plus check out minutes. Dr. Hong figures out a way to arrange themselves properly to minimize the sum of those minutes. What is the total minutes of that sum?