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Thanks so much for that! Got an abscess and cannot think straight and it has been giving me a headache. But, to be honest, maths is not my strongest point! I used to get hit on the back of my hands with big ruler if I got a question wrong, and I think it has scarred me for life! That is my excuse and I am sticking to it. Seriously though, it has driven me round the bend for 3 days and although I think I got close to the answer the more I looked at it the further away I got from it.. Now I can get on with my sad life again!