I have received my latest copy of RCM&E today and whilst I normally devour your august journal from cover to cover, this month I feel your maths skills may be lacking in the accuracy department. When I went to school, which I admit was a long time ago, one £200 pound prize plus 4 x £50 makes a total of £400 not the £450 you advertised for taking part in the survey.
Regards
Dave Barber