A.18.37% B.24% C.24.49% D.18%
A.2.00% B.12.00% C.12.24% D.18.37%
A.6% B.6.33% C.6.67% D.7.04%
A.持有现金的机会成本 B.交易成本 C.现金短缺成本 D.现金管理费用
A.15.38% B.14.29% C.12% D.10.8%