How to display two different data types in one form fields in Adobe Forms

Hi Experts,

  I have an requirement and stucked on it. I have an internal tables containing fields as below:

   table : IT_tab

                 WAERS          T_BAL          L_BAL

               ---------------        ------------       -------------

TYPES    ( WAERS )      ( DMBTR )    ( STRING )

DATA:       USD                -1234.67                            (USD then 2 decimal place)

                 IDR                                   123467 -          ( No decimal Place )

1. Each line has data as currency( WAERS), total balance (DMBTR), and converted balance(STRING). Adobe Form has a form field named f1 (as decimal

    type), If waers is USD then I have to display T_bal at Form field f1, if it is IDR then have to display L_bal. Please suggest me how to do this.

2. The problem is with minus ( - ) sign. if try to display value from L_bal, It display minus sign at right hand side, while it should be display at left side. Please tell how to do that?

Thanks

Piyush