Data flow from BL to JC

Hello Everybody,

In Quick Bill there is a Standard Item that could be linked to Cost Type like Labour, Materials etc. I'm curious if this information finds its way into JC tables or not. I had no success finding it there. There are line items from the invoice, but they have no Cost Type records. Or maybe I'm looking at the wrong tables?

I'd like to be able to compare Billing by Cost Type with Actual Cost by Cost Type. 

If anybody could help that would be greatly appreciated :)

Thank you!

S.