Chargeable gains – Disposal of shares

Hi,

I am working out ‘Problematic Ltd’ from June 2010. Regarding note 1 disposal of shares, it states the following:
– 14 June 2012 16,000 £1 shares were sold for £54,400
– Originally purchased 15,000 shares on 26 June 2005 for £12,600
– On 28 September 2008 a 1 for 3 rights issue was taken up paying £2.20 for each new share issued
– The RPIs are June 2005 192.2, September 2008 218.4, June 2012 242.3

I used the three column proforma for the pool with number of shares, cost and indexed cost.

I first inputted the purchase on 26 June 2005 and then indexed to September 2008. Then there was the rights issue on 28 September 2008 and indexed again to June 2012. After this there was the sale..

What I cannot understand is why the cost of £18,880 was used for the sale of 16,000 shares. Could you kindly explain how to arrive to this figure please?

Sorry for bombarding you with questions but I seem to be coming across a lot of problems this weekend 🙁 and you have been very helpful.

Thanks!