Subodh is a wholesaler of A4 Photocopy Paper. He purchases paper in bulk quantities, which enables the manufacturer to take advantage of economies of scale. Subodh purchases paper from manufacturers on cash basis and sometimes even give advance money for bulk orders. As Subodh is in direct contact with the retailers, he keeps informing the manufacturer about the changes in customers' preferences, market conditions, etc. Identify the 'Services of Wholesalers to Manufacturers being provided by Subodh by quoting lines from the given case.