Thank you very much for taking the time to deal with my question - I really appreciate your assistance.

I have just had a quick look at what you have sent me and I think it will take me some time to get my head round the intricacies of what you have produced!! This is a very different world for me but I will explore this and will try it out with my data. I will let you know how I get on.

But again, very many thanks for all you have done - the charity will, I am sure, benefit from your work.