This is a very good price and might stay for some time. I saw a TV ad mention this as low price for spring. Price was still showing as $12/kg online on Sunday 20th AEST but now updated as we have moved to Mon 21st AEST. Note that even the old $12 /kg price was a recent low and it was earlier $15 since some time, with the $12 price an occasional weekly promotion.
Current Woolies Price looks like $10/kg across different weight categories
Coles for eg. mentions the $12/kg price as "dropped and locked" till Aug 29 and mentions the $15/kg (was $42 for 2.8Kg) as old price few months back in June.
So we'll have to wait and see by month end if Coles goes back to $15, stays at $12 or matches Woolies at $10 (most likely I guess)
Either way a pretty good price at $10 for now at Woolies and hopefully soon at Coles too