Yes indeed, is no needed for someone who play FoE for some time. But for someone who barely starts, and does not understand very well negotiations, will do what FoeHelper shows. And will spend some goods without needed….
IMO, even only on coins and supplies, the first thing which must fill, must be only coins, and after that supplies. I think most of players have a stock with coins greater than supplies.
PS: Sorry for my english, is not my daily language..