I want to create a job of x item for 5 ton out of which 3 ton is completed for x item and 2 ton for

Dear all,
I want to create a job of x item for 5 ton.Out of 5 ton, I am getting 3 ton for x item and 2 ton for x1. How to capture this scienario in discrete manufacturing.
Please suggest a work around.

Thanks,
Sabyasachi,