Note that even though the current catalogue states that All Surf Life Saving Sunscreens are 1/2 Price, the 200ml varieties may not scan as such, given that their online prices are $13.50 (Save $3)
If that happens, then under the Supermarkets Scanning Code of Practice, one is free:
It is not necessary for the customer to have paid for the item or to have left the store to be entitled to receive the item free of charge.
Just as a side note picked some up from Woolies last week when they had several brands on special. Most had a best before of oct/nov 2016 on the shelf. Sunscreen protection does deteriorate so make sure you check first. Suspect they are trying to clear last years batches.