A.1500 B.1710 C.1728 D.1740
A.1000元有利差异 B.1000元不利差异 C.3000元不利差异 D.1500元不利差异
A.1000元有利差异 B.1000元不利差异 C.3000元不利差异 D.4000元有利差异