T511K constant value into IT 0015

Hi All,

I have created WT 0410 in IT 0015 (Additional Payments). Whenever, I create WT 0410 & enter units as 1 months, Value 400 SAR should get update automatically from T511K table.

If I enter 2 months, (2 * 400 SAR) = 800 SAR should get updated in amount field.

How to achieve this. Assist me providing detail step.

Amount entered should finally come in Payroll.(Hope, if IT gets updated, this will come in payroll by default).

Regards

Hari Prasath