You shouldn't be to happy with a 2 beer profit Steve. 2 beers = 12 tl
This means you have a nett total sterling value of £10,004.33 using Jim's 2 beer profit.
But an increase in exchange rate of +0.01/£ - say from 2.76 to 2.77 over the entire year - takes your £10,000 investment 12 months ago from 27,600 TL back then, to a value of £ 9968.23 (27,612 TL/2.77) on re-exchange to sterling. So, for every 1 kurus increase in TL/£ exchange rate, you lose far more than the two beers you gained
Disclaimer: Exchange rates go up when you are going on holiday and down when you need pounds.