TIP!! - S26 Gold Formula for $17.10 per can
However when I tried to get the toys-r-us sale priced formula on Saturday they had none on the shelf :( grr. Chemmart does a price match +10%, so I showed them the catalogue and ended up getting it for $17.10 per can. They also have a rewards program where you get 5% back to spend at the store (so I have 85c in credit per can, and it's pretty handy with how much I seem to spend at the pharmacy). This is by far the cheapest price I can find so I have stocked up!