Actually, the pricing of individual items doesn't change. (Not least because of GST the price you pay at the till is not the sticker price.)
Where I live the 1c and 2c coins were killed some time ago. The smallest coin now is a 5c.
The way it works is that you go to the checkout, get a final total. If you pay cash then the change is "rounded up" to the nearest 5c mark. If you pay via card you pay the exact amount.
It's really not complicated, and frankly no-one cares about it.
In the interest of full disclosure I was talking about USA GST (Sales Tax) not the tax where I live. In the US the price on the shelf seems to be a "rough indication" of how much you may pay when you get to the till...
That I noticed this suggests I live in a VAT country not a GST country :)
Where I live the 1c and 2c coins were killed some time ago. The smallest coin now is a 5c.
The way it works is that you go to the checkout, get a final total. If you pay cash then the change is "rounded up" to the nearest 5c mark. If you pay via card you pay the exact amount.
It's really not complicated, and frankly no-one cares about it.