I'm stuck on another question! Please could somebody be so kind as to assist me with the workings required in order to answer this problem? Many thanks in advance.

A firm had the following financial accounts and data values for 2017. Rand Rand Financial account 3 060 Cost of goods sold 500 Preference share dividends 126 Tax rate 600 Number of ordinary shares outstanding 1 800 Sales revenues 18 Account receivable 40% Interest expense Total operating expenses Accounts payable 1 000 240 The firm's earnings available to ordinary shareholders for 2017 were... 25. R195.40 -R224.25 R302.40 R320.40 1. 2. 3. 4