This excerpt taken from the AMX 20-F filed Jun 30, 2006.
Statement of changes in Financial Position
Mexican accounting Bulletin B-12, Statement of Changes in Financial Position, issued by the MIPA specifies the appropriate presentation of the statement of changes in financial position based on financial statements restated in constant Mexican pesos. Bulletin B-12 identifies the sources and applications of resources
AMÉRICA MÓVIL, S.A. DE C.V. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(Continued)
(Amounts in thousands of Constant Mexican Pesos
as of December 31, 2005, except when indicated otherwise)
representing differences between beginning and ending financial statement balances in constant Mexican pesos. In accordance with this Bulletin, monetary and foreign exchange gains and losses are not treated as non-cash items in the determination of resources provided by operations.