RELATED PARTY TRANSACTIONS: (Tables)

6 Months Ended

Jun. 30, 2013

Receivable and payable balances with related parties are shown below (in millions):

	As of
	June 30, 2013		December 31, 2012
Related parties receivable current:
Grupo Mexico, S.A.B de C.V. (“Grupo Mexico”) and affiliates	$	0.8	$	1.8
Compania Perforadora Mexico, S.A.P.I. de C.V.	0.7		0.5
Mexico Generadora de Energia S.de R.L. (“MGE”)	8.7		—
Compania Minera Coimolache S.A.	23.4		23.4
	$	33.6	$	25.7

Related parties receivable non-current:
MGE	$	170.7	$	184.0

Related parties payable:
Grupo Mexico S.A.B. de C.V. and affiliates	$	2.7	$	—
Asarco LLC	0.4		15.3
Higher Technology S.A.C.	0.1		0.2
Breaker S.A. de C.V	0.1		—
Sempertrans Belchatow SP. Z.O.O.	0.3		—
Mexico Transportes Aereos, S.A. de C.V. (“Mextransport”)	0.3		0.1
Mexico Proyectos y Desarrollos, S.A. de C.V. and affiliates	0.8		2.1
Ferrocarril Mexicano, S.A. de C.V.	3.1		2.6
	$	7.8	$	20.3

The following table summarizes the purchase activity with related parties in the six months ended June 30, 2013 and 2012 (in millions):

	Six months ended June 30,
	2013		2012
Grupo Mexico and affiliates:
Grupo Mexico Servicios, S.A de C.V	$	6.9	$	6.9
Asarco LLC	70.7		16.4
Ferrocarril Mexicano, S.A de C.V.	11.1		7.4
Compania Perforadora Mexico, S.A.P.I. de C.V and affiliates	2.6		1.1
Mexico Proyectos y Desarrollos, S.A. de C.V. and affiliates	26.6		24.8

OtherLarrea family companies:
Mextransport	1.5		1.5

Companies with relationships to SCC executive officers families:
Higher Technology S.A.C.	1.0		1.5
Servicios y Fabricaciones Mecanicas S.A.C.	0.1		0.1
Sempertrans France Belting Technology	0.2		—
Sempertrans Belchatow SP. Z.O.O.	0.3		—
PIGOBA, S.A. de C.V.	0.1		0.1
Breaker, S.A. de C.V.	1.8		1.2
Breaker Peru S.A.C.	0.2		—
Total purchased	$	123.1	$	61.0

The following table summarizes the sales and other revenue activity in the three and six months ended June 30, 2013 and 2012 (in millions):

	Three Months Ended June 30,				Six Months Ended June 30,
	2013		2012		2013		2012
Asarco	$	35.2	$	0.4	$	71.8	$	11.4
Mexico Proyectos y Desarrollos, S.A. de C.V.	0.2		0.1		0.4		0.2
Cia Perforadora Mexico S.A.P.I. de C.V. and affiliates	0.2		—		0.3		—
MGE	0.6		—		0.7		—
Mextransport	0.1		0.1		0.2		0.8
Total	$	36.3	$	0.6	$	73.4	$	12.4

Mexico Transportes Aereos S.A. de C.V. ("Mextransport")

Conditions and balance as of June 30, 2013 are as follows:

	Loan
Original loan balance (in millions)	$	8.5
Maturity	August 2013
Interest rate	Libor + 0.15%
Remaining balance at June 30, 2013 (in millions)	$	0.6

Compania Minera Coimolache S.A.

Conditions and balance of the loan as of June 30, 2013 are as follows (in millions):