<prompt> Translate the following text to EnglishMatokeo ya uchunguzi ni kuonyeshwa katika mchoro wa 3. mstari wa juu inawakilisha asilimia ya gharama ya utoaji ya gharama ya jumla kama kazi ya vipande kwa kila mtu kama ilivyotarajiwa na mfano wetu wa gharama.  <response>: Empirical findings from the investigation are presented in Figure 3. The top line represents delivery cost percentage of total cost as a function of pieces per capita as predicted by our cost model. 