<prompt> Translate the following text to EnglishKwa sababu ya kadi za kuingia, Tume ilidhani kwamba uhusiano kati ya kadi za nje za Marekani na kiasi cha jumla cha barua ya nje ya Air Canada na Air Canada inatumika kwa barua ya ndani ya Air Canada.  <response>: Because there are inbound cards, the Commission assumed that the relationship between U.S. outbound cards and the total volume of outbound Air LCAO mail applies to inbound mail Air LCAO. 