Izo ndishyi mboneza musaruro rero zikaba zibazwe muri ubu buryo. 5.000 frws (umusaruro ku munsi ) x 30 ( imini y’ukwezi ) x 12 umubare w’amezi ) – 20.000 frws ( umusaruro w’iminsi 4 ibura ku kwezi kwa 12 ngo kurangire ) =1.780.000 frws. II. ICYEMEZO CY’ URUKIKO
