题目

I live in the land of Disney, Hollywood and year-round sun. You may think people in such an attractive and exciting, fun-filled place are happier than others. If so, you have some mistaken ideas about the nature of happiness. Many intelligent people still consider happiness equal to fun. The truth is that fun and happiness have little or nothing in common. Fun is what we experience during an act. Happiness is what we experience after an act. It is a deeper, more lasting emotion. Going to an amusement park or ball game, watching a movie or television, are fun activities that help us rela（本小题15分）某工厂建造一间地面面积为12的背面靠墙的矩形小房，房屋正面的造价为1200元/，房屋侧面的造价为800元/，屋顶的造价为5800元,如果墙高为3，且不计房屋背面的费用，则建造此小房的最低总造价是多少元？