A Metal Fabrication Company Is Pricing Raw Supplies of Aluminium

A metal fabrication company is pricing raw supplies of aluminium. The following are the costs to the company to receive one tonne of aluminium from various sources. Which source offers the best price for aluminium per tonne?

A) 3 206 US dollars per tonne, with $1 AUD = $1.05 USD
B) 3 012 Australian dollars per tonne
C) 4 998 Brazilian reals per tonne, with $1 AUD = 1.282 BRL
D) 121 756 Indian rupees per tonne, with $1 AUD = 47.619 INR