如何选择两个最高的支付价格

This is the input data.

这是输入数据。

  Dept            Company                   Code      Payment Amt

Gardeners     Sort:Insurance Carrier        100         20.00
Gardeners     Sort:Insurance Carrier        100         22.00
Gardeners     Sort:Insurance Carrier        100         21.00
Gardeners     Sort:Insurance Carrier        100         20.00
Gardeners     Sort:Insurance Carrier        100         22.00 
  Dept