Error in GOSI

Dear,

I am giving support to a SAUDI Client and I've one issue in GOSI pay for an employee.

The employee Salary is as : Basic: 3000

Below is the screenshot of overall view of Infotype 0008.

When we hired an employee:

Pay change:

As per the Saudi localization the Gosi should be 10% of Basic then it should be 300 from employee side.

But in RT table its taking HRA 500 and basic 3000 total GOSI it is deducting 350 but the user has no where maintain HRA 500 for this employee.

Below is the screenshot of RT.

i am unable to find out from where the system is taking /660 housing allowance wagetype though we not maintain it in Master data any where..

Please provide the best solution to get it resolved. Looking forward for early response....

Thanks

Mohammad Shahbaz