HOW would would know what brands are available to you in whatever place IN THE WORLD you live? [We don’t!!]
It VARIES; depending on their age and energy/metabolic rate and the CALORIES PER CUP (in any specific food, fed). Higher priced foods with MORE DIGESTIBLE ingredients, are often actually cheaper as it takes less to feed. You need to figure it out or you don’t need any dog, let alone a PACK.