Just a heads up, various Pak'nSave stores are having their Christmas Club discount days this week (and probably the next), and there will be some one-day only deals. I recommend you monitor your local store's Facebook page.
For example here's the Christmas Club discount post for PnS Wairau.
https://www.facebook.com/WAIRAUpns/posts/3081358592118041
Do you have to be signed up to the xmas club?