A.10.33% B.11.33% C.12% D.13.3%
A.28% B.18% C.27% D.17%
A.單位貢獻(xiàn)邊際 B.貢獻(xiàn)邊際率 C.綜合貢獻(xiàn)邊際率 D.單價(jià)一單位變動(dòng)成本