I hadn't noticed the relationship between b2 and the added ammount thing, well spotted.
I think next time I code something I'll start by looking specifically for relationships like that. I can understand how your idea works, I've pasted it in, will test tomorrow. Some of this sort of thing gets beyond me if I'm getting fed up and dont really want to work on it. In which case I ought to stop and do something else really. Also my maths is pretty poor!
I think next time I code something I'll start by looking specifically for relationships like that. I can understand how your idea works, I've pasted it in, will test tomorrow. Some of this sort of thing gets beyond me if I'm getting fed up and dont really want to work on it. In which case I ought to stop and do something else really. Also my maths is pretty poor!