I'm finishing off my tax return (last minute as always) and I am stumped on the capital gains bit.
In the last tax year, I sold my business. It was a limited company, I established it with £8k of my own money and I sold it for £14. I can't work out how the capital I put in is deducted from the sale price to work out my profit, because clearly I have only actually made £6k out of the deal, but what is the capital introduced classed as? Is it purchase price, improvement costs or not deductible? 
Help!
Thanks in advance for any pointers!