Restricted KF and Calculated KF

Hi All,

I have below characteristics and KF.

Char:

Booking Date -ZBOOKDT

Arrival Date - ZARRDT

KF:

Sales Order Count - ZSOCNT

Requirement:

what want to do is, if Booking Date and Arrival Date is within 90 days get the SO count. I want to use RKF (Restricted KF) and CKF (Calculated KF) for this whole calculation.

What i did was created CKF and 2 formula variables using replacement path referencing two dates mentioned above.i used logic (ZBOOKDT - ZARRDT) <= 90 * 0 + 1.

How do i use the result from CKF in my RKF and get the result i want?

Regards,

DTD