OK, I've figured out whats happening here - As per earlier message, the ozpost server will quote this as $12.10 due to rounding. This price includes GST, so the figure being displayed to you ($11.00) is the pre-GST amount ($11.00 + $1.10 = $12.10).
Your other shipping quotes have the same 'error' - EG, AustPost Parcel - Shows $11.73 - The actual cost is $12.90 ($11.73 + $1.17)
In other words, you have something amiss with your GST/Tax settings.
If you are NOT registered for GST the solution is simple... under the ozpost admin settings is one to enable/disable the tax... It appears that you have this enabled - Just set it to 'none' and the quotes will be correct.
If you ARE registered for GST, you will need to enable this option AND ensure you have the correct TAX rates set for the Australia zone, and again, your customers will be presented with correct GST inclusive quotes.
The fact that you are seeing tax exclusive prices would indicate that you have enabled the GST functions, but haven't set a GST tax amount.
I know this may seem a bit convoluted, but in order to get the figures 'right' for both GST and non GST registered clients the ozpost module needs to take the GST inclusive prices provided by the servers, present them 'as is' for non GST merchants, but reduce them by the GST amount for those merchants that are GST registered... The zencart core code then calculates the amount of tax that needs to be added to the shipping based on the tax rates defined ... Since this tax rate should be 10%, the same that ozpost had reduced it by, the net result displayed will once again be GST inclusive - The only difference is that 'zencart' now 'knows' about this GST component and as such will show it as such on the invoices, etc.
I realise that many small GST merchants wouldn't normally even consider claiming the postage tax back as an input credit (partly because it is difficult to keep track oll those small amounts), but a busy store could be spending a small fortune on postage and these credits can add up pretty quickly.
On the other hand, any merchant that has a turnover of less than $75,000pa would be foolish to register for GST anyway - It provides no gains, and effectivly makes 'em an unpaid tax collector. (been there, done that).
Anyway, the cause of your problem has been identified - You shouldn't have too much problem fixing it. :-)
Cheers
Rod
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