Compare, multiply, divide wagetype amounts in Rule

Hi,

wagetypes 1000, 10001, 1002 prcessed in payroll and stored in RT Table. Now i want to process another wage type (2000) amount with comparing the wagetypes 1000, 10001, 1002 Constant amount (KONST) from Payroll parameter tabel.

In case of wagetype 10002 amount exceed KONST amount ---> Wagetype 2000 Value should calculate as 1000 * 10001/1002

In case of wagetype 1002 amount less than KONST amount ---> Wagetype 2000 Value should equla to 1000

Any one help on this...

Thanks in Advance!