The Secretary of State shall turn over to the State Treasurer the net proceeds of escheats after deducting and retaining therefrom for the benefit of the Sinking Fund so much money as in the opinion of the State Department of Administration will reimburse the Sinking Fund for moneys and agents’ services used and advanced as aforesaid and also any other expense necessarily incurred in executing the law and protecting the interest of the State in the matter of escheats. Costs and expenses incurred as aforesaid on account of agents’ services and money advanced or otherwise in one case may be deducted and retained from the proceeds of any other case of escheatment in the discretion of the State Department of Administration.