Please correct these sentences

[Annecy]

As the above projects have been completed, please ask the subocontracts to return the balance materials of what we have issued to them to our warehouse

[gabber]

As the above-mentioned projects have been completed, please ask the subcontractors to return to our warehouse the materials that we issued to them.

[Annecy]

Can I write as follows.
As the above-mentioned projects have been completed, please ask the subcontractors to return to our warehouse the balance materials of what we issued to them.