Uko igiciro cya Coltan gikora
Sobanukirwa ibinjizwa bigena igiciro cya nyuma ku kilo.
Igiciro cya Coltan gitangira ku gaciro k'isoko, hanyuma hakurwamo frais de traitement n'avance yumvikanyweho mbere yo kongeraho RRA, transport, n'amafaranga y'Inkomane.
Ibiro bya nyuma (Net weight) ni bwo bukungu bw'ingenzi. Ikosa rya 1% ku biro rigenda riyongera kuri buri muri y'imbere, kuburyo ugomba kwiyemeza ukoresheje ibipimo bizizewe mbere yo kubika.
RMA fee mu nyandiko iri kuri dry-metric-ton; calculator ikwemerera kuyandika nta kuvunja amabuye. Igicoro cyo kuvunja (USD kuri RWF) gihindura amafaranga ya USD muri RWF mu gihe ubitse.