Capture of Quanties PRoduced on a Physical Job Site thru E1 Job Cost Module

Hello,

We have finished creating a NEW JOB Budget WBS that will help capture Quantities produced on a job site.

In the example below , we have defined cost type "0997" as  a line that will capture the actual qties produced from  our people installing product on a job. Cost type 0998 is how  many QTIES we are budgeting to complete.

By setting up the WBS in this fashion , we are hoping to get a budgeted unit cost and an actual unit cost. 

My question is :  Where or how is the best place/process to get the "Actual QTIES Produced/installed" into E1 ?