This is the cheapest price I could find for FIFA 16 on PC. Bit more difficult because it is an Origin download rather than a steam one.
Currency conversion was done using whatever service Google uses, you will most likely be a few dollars worse off through Paypal et al.
Edit: With Paypal's conversion rate it comes out to $65.51 AUD.
$55 from the Mexican Origin store. It's a shame our dollar is so bad or it could have been less.