That's actually one of the more popular suggestions on the StackExchange question I asked that motivated these prototypes: http://ux.stackexchange.com/question

That's actually one of the more popular suggestions on the StackExchange question I asked that motivated these prototypes: http://ux.stackexchange.com/questions/3736/how-to-build-a-budgeting-interface-sum-of-items-must-equal-100 http://ux.stackexchange.com/questions/3736/how-to-build-a-bu...