<prompt> Translate the following text to SwahiliThe volume variables are the number of pieces in the category and the price variables are fixed-weight indexes of the range of prices paid by the mailpieces making up the category.  <response>: Kiasi cha vipengele ni idadi ya vipengele katika jamii na bei ya vipengele ni fasta uzito viashiria ya mbalimbali ya bei kulipwa na mailpieces kuunda jamii. 