You get 5 foodsacks daily by completing mission. Each box can give 1, 3 or 5 points. Thats 35boxes, each worth anywhere between 35x1 and 35x5, so 35-165 points total. For full hiruzen, you need 30*80=2400 points. Best case scenario it's 2400/5 *10cp = 4800cp, middle (3p/box) 2400/3 *10cp= 8000cp, worst case scenario it's 2400/1 *10cp= 24 000cp.