Cash
Cash is the only game in town. Cash pays bills and obligations. Inventory, receivables, land, buildings, machinery, and equipment do not pay obligations, even though
Accounts Receivable (A/R)
Accounts receivable are dollars due from customers. They arise as a result of the process of selling inventory or services on terms that allow delivery prior to the collection of cash. Inventory is sold and shipped, an invoice is sent to the customer, and later cash is collected. The receivable exists for the time period between the selling of the inventory and the receipt of cash. Receivables are proportional to sales. As sales rise, the investment you must make in receivables also rises.