A.6000 B.12000 C.4000 D.8000
A.當(dāng)銷售收入增加10% B.當(dāng)固定成本下降10% C.當(dāng)固定成本下降15% D.當(dāng)銷售收入增加15%
A.45735.19 B.50000 C.45004.5 D.40000