6

    723c+t3c+t

    80it8848idg

    7

    85

    idg

    idg

    811

    812

    a

    b

    10%5000

    500

    7500250050

    25005%

    500

    10%500025005%4.35%

    25007.07%

    500025008.12%

    7.07%