gbong hospital tries to purchase a new medical machine to give patients better services. There are three kinds of machines to be purchased, Machine A, Machine B, and Machine C. The purchasing cost for Machine A is 10,000,000 won and the operating cost for Machine A per a patient is 10,000 won. The purchasing cost for Machine B is 20,000,000 won and the operating cost for Machine B per a patient is 5,000 won. The purchasing cost for Machine C is 30,000,000 won and the operating cost for Machine C per a patient is 3,000 won. If the number of patients of Yongbong hospital it to be expected as 3,000 Which machine should Yongbong hospital purchase to minimize the total cost?