Kevin Groat

I took on the unenviable task of treasurer of our works investment club and with the end of the tax year looming I realise I'll need to calculate the loss/gain for each club member. Anyone have any experience of calculating this? I have found a software package that'll do this but at £60 they can forget it - our clubs been running 4 years and we've only just broken even let alone make a profit to buy software like this.
I've loads of questions but little point listing them unless there's anyone here that can help.

Kevin.