You will need to find the operating cash flows from a cash flow statement or you can use the direct or the indirect method to find the cash flow from operating activities, then add interest paid (received) and deduct tax paid too. Then you will need to deduct the amounts paid for preference shares (redeemable and irredeemable). This should give you the operating cash flows.
The operating cash flows per share is simply taking the operating cash flows from the step above and dividing it with the number of ordinary shares outstanding (or common stock). Be careful not to use the amount or the value of the common stock. You need the number of shares issued.