formula variables with processing type replacement path

Hi Bex  Experts

Could you please suggestion the below issue

I Have fields Ware house number,Exception codes, target Qty, Actual Qty, Diff QTY.

How to derive the   "no.of Exception task:"

This report is to list out the exceptions codes and total no. of Pick Task having such exception code. Exception Code is nothing but the reason to say why Picking was not complete. Pick Tasks are identified by warehouse process type provided in the static filter. Please note, all pick tasks will not have exception code. Exception Code says that the picking was unsuccessful or incomplete. There will be difference quantity picked from target to be picked. This report includes only the picks task with exception code.

Place a static filter on Exception Code as not equal to "Not Assigned" and other static filters as mentioned in the spec.

If Exception Code in selection parameter is fed with values, then do filter only for those exceptions codes.

Eg: If below are the count of pick warehouse tasks available for selected period for warehouse MP00,

Total No.of Pick Tasks - 100

BIDF Exception Pick Tasks - 25

BIDP Exception Pick Tasks - 10

CHHU Exception Pick Tasks - 20

If no exception code is entered in the selection parameter, then the output should be as below.

If exception code in the selection is fed with value as 'CHHU', then the output should show only the third row in the above table.