A.15%B.25%C.35%D.45%
A.3% B.4% C.14% D.14.72%
A.現(xiàn)金持有成本 B.現(xiàn)金短缺成本 C.現(xiàn)金轉(zhuǎn)換成本 D.最佳現(xiàn)金余額