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The ACCC says:
"Coles supermarkets are the cheapest in 40 of the 61 regions surveyed. This compares with 52 of 61 regions in the inaugural GROCERYchoice survey.
Further, on a national basis, the price difference between Coles, Woolworths and independent supermarkets has narrowed.
ALDI remained the cheapest for a basic staples basket.
The survey results are issued on the first business day of each month."