Does wic last?

Anybody that's on wic does your formula last you the whole month or do you usually last? I know every baby eats different but I'm looking for on average. Before I had canceled my wic because my baby was on similac sensitive and they didn't cover it. Now my doctor wants us to switch to this formula that is 30 bucks for a small can 😱😱 wic covers it so I'm going to get back on it before I switch but I want to know if they give you enough to last because I cannot afford to buy that formula! We are not bad off but the formula I use now is 30 bucks for the big can and we go through it like crazy. That little can would last my daughter like 3 days she's a fatty lol