The Accounts Receivable to Sales Ratio is a business liquidity ratio that measures how much of a company's sales occur on credit. How Does Accounts Receivable Work?Generating timely and accurate customer invoices on a monthly basis. Maintaining accounts receivable records to ensure aging is up to date. Contacting Ecolab and Nalco Water is easy. Just pick one of the options on this page and whoosh, you are off to the right place to get help.