<prompt> Translate the following text to EnglishKwa mfano, idadi ya barua za matangazo na malipo ya kwanza ya darasa la kwanza ni sawa na idadi ya barua za matangazo na malipo ya darasa la kwanza.  <response>: It should be noted that the figures of billpayment and advertising mail presented in Table 2 account only for the First-Class household mail and, thus, represent the lower bound of First-Class billpayment and advertising mail volumes. 