With the new Costco opening up in north Brisbane I thought I ask where most you guys shop and what you find the cheapest (good quality). currently we spend approx. $400 bucks a fortnight on food that's with 2 adults and a 3 yr old at woollies. With a second child on the way I am positive this will increase. so I am asking if you have a Costco near bye is the membership worth it in savings or am I best of finding what I like at aldi and woollies.