Just noticed that this was now only $0.53 down from $3 a few months ago (http://www.ozbargain.com.au/node/74720)
http://www.officeworks.com.au/retail/products/Catering-and-C…
Last time this was posted it got ripped on a bit, and someone said they were past their best before date so only posting this in the forums. Seems to be in stock but I didn't check in store.
Chips are cheap as well
http://www.officeworks.com.au/retail/search/%22Catering+and+Cleaning%22?displayedQuery=clearance+%22Catering+and+Cleaning%22&resultsPerPage=50&sortBy=priceAsc&attribute=clearance(text)%3dtrue