Barstead 12/09

Dear Sir would you please help me about this question!
the issued share capital of Savoir , a publicly listed company, at 31 March 20×5 was $10 million. Its shares are denominated at 25 cents each.
On 1 April 20×5 Savoir issued $20m 8% convetible loan stock at par. the terms of conversion (on 1 April 20×8) are that for every$100 of loan stock, 50 ordinary shares will be issued at the option of loan stockholders. alternatively the loan stock will be redeemed at par for cash. also on 1 April 2005 the directors of Savoir were awarded share options on 12m ordinary exercisable from 1 April 2008 at $1.5 per share. the average market value of Savoir’s ordinary shares for the year ended 31 March 2006 was $2.5 each. the income tax rate is 25%. earning attributable to ordinary shareholders for the year ended 31 March 2006 were $25,200,000. the share options have been correctly recorded in the financial statements .
required: calculate Savoir’s basic and diluted earnings per share for the year ended 31 March 2006. you may assume that both the convertible loan stock and the director’s options are dilutive.
the answer the BBP gave is that:
Basic EPC=$25.2M/84M=30c, my question is how the 84m was calulated?
many thanks