$4 billion gladstone steel plant

On their steel plant public consultation invitation it's $4 billion,
http://www.gladstonesteelproject.com.au/pdf/Boulder%20Steel%20Community%20Consult.pdf

On Queensland Government site it's $2.8 billion,
http://www.dlgp.qld.gov.au/projects/mining-and-mineral-processing/steel/gladstone-steel-making-facility.html

On Boulder Steel project home page it's $1.8 billion,
http://www.gladstonesteelproject.com.au/index.html

A big difference, I phoned Carl Moser to shed a little light on the quoted variations this afternoon,

$1.8 billion is the 1st stage
$2.8 billion is the plant cost
$4.0 billion is the total cost including infrastructure