Gold pattern pointing up, page-1161

Can someone explain something to me.
If a mine has an Aisc of $1100 aud and 6 months ago aud pog was $1368 margin equals $268.
Now if 6 months later ie today $1532 -$1100 Margin equals $432.
Now $1532/$1368= 1.119 so 12%

If $432/$268 = 1.611 so 61%

I am not very good at maths so I will ask professor Johhny and Skol. Does this mean a 12% rise in Aussie dollar gold represents a 61% rise in margin.
Therefor a 1% rise in Aussie dollar gold represents about a 5 % rise in profit give or take or at aud 80c
1/0.8= 1.25 x 5% = 6.25% meaning a
1% rise in USD gold price roughly equals a 6.25% rise in revenue\ pre tax profit if status quo of forex is maintained.
Hmmmm, have I overlooked something here. Surely I have made a mistake.