You sure it wasn't $40/bottle? It was $40/6 pack? If the latter, you got an amazing bargain 
		 
		
	 
I paid $50 for the six pack, $10 delivery.
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                                                               Tax Invoice                     
                 
                                                               [TABLE="class: table table-condensed invoice-table"]
                                                              [TR]
                                     [TH="class: description"]Description[/TH]
                                     [TH="class: description"]Size[/TH]
                                     [TH="class: fluid-width"]Qty[/TH]
                                     [TH="class: unit-price"]Unit Price
(incl. GST)[/TH]
                                                                                                             [TH="class: gst"]GST[/TH]
                                     [TH="class: total-price"]Total Price
(incl. GST)[/TH]
                                 [/TR]
                                                                                               [TR]
                                         [TD]Langton's Confidential IV six pack MV [/TD]
                                         [TD]900ml[/TD]
                                          [TD]1[/TD]
                                         [TD="class: nowrap"]$40.00[/TD]
                                                                                                                         [TD="class: nowrap"]$3.64[/TD]
                                         [TD="class: nowrap"]$40.00[/TD]
                                     [/TR]
                                                      [/TABLE]
                     
                 
             
                                                    [TABLE="class: payment-summary pull-right"]
                                                      [TR]
                                 [TH]Sub-Total (excluding GST)[/TH]
                                 [TD]$36.36[/TD]
                             [/TR]
                             [TR]
                                 [TH]TOTAL GST[/TH]
                                 [TD]$3.64[/TD]
                             [/TR]
                              [TR]
                                 [TH]Total (including GST)[/TH]
                                 [TH]$40.00[/TH]
                             [/TR]
                                  [TR]
                                     [TH="colspan: 2"]Payment Details[/TH]
                                 [/TR]
                                                                                         [TR]
                                     [TH]Payment[/TH]
                                     [TD]$40.00[/TD]
                                 [/TR]
                                                         [TR="class: due"]
                                 [TH]Balance Owing[/TH]
                                 [TH]$0.00[/TH]
                             [/TR]
                                              [/TABLE]