Consultant cost and revenue

Hi,

We are implementing Oracle Projects costing and Billing purchasing and
financials

We have a requirement where sub contracts are hired from a consulting
company and are billed based on timesheets,

The billimng cycle can be weekly/bi weekly.However the payment to the
consulting company is at the end of the month

How i configured this was create a PO and in the DFF select the sub
contractor(CWK DFF)

Use the exp type which has rate required checked.(Contractor Hours)

Use that in PO

In Oracle Projects enter a CWK Time card with zero cost rate and
Invoice that as per invoicing cycle