<prompt> Translate the following text to EnglishGharama ya usafirishaji inategemea kiasi cha usafirishaji, kwa hivyo kulinganisha gharama za usafirishaji kati ya Ufaransa na Marekani ni rahisi.  <response>: The variable cost of delivery depends on volume delivered, thus the comparison of variable costs between France and the U.S. is straightforward. 