A.2 B.10 C.15 D.30
A.A類存貨品種多,金額大 B.B類存貨品種少,金額大 C.C類存貨品種少,金額少 D.A類存貨品種少,金額大
A.20.99% B.28.82% C.25.31% D.16.33%