Operating cash flow is the amount of cash generated by the main activities of a business. It gives you an idea on how well your business is run and if it is profitable from its main activities.The operating cash flow of a retail business is the amount of cash generated by its retail activities. This business may generate cash from other activities, such as renting store space to designers, but the cash generated from these activities doesnt count toward its operating cash flow. You can calculate operating cash flow using the direct method or the indirect method. To calculate it using the direct method, you subtract the total operating expense from the total revenue. If the total revenue of your business is $200,000 and the total operating expense is $150,000, the operating cash flow is $200,000 – $150,000, or $50,000.To calculate the operating cash flow of your business using the indirect method, you adjust the net income of your business for items that were used to calculate it but didnt affect cash, such as changes in accounts payable and accounts receivable. Say the net income of your business is $150,000, change in accounts payable is $25,000, and change in accounts receivable is $60,000, the operating cash flow of your business is $150,000 – $60,000 + $25,000, or $115,000.A business with a negative operating cash flow isnt making money from its operation, and this usually spells trouble. Before you invest in a business, make sure you check its cash flow statement.