Habka cabbirka ee albaabka hoolka wiishka ee sare ee daaqadda
Wadarta dhererka la cabbiray u qaybi 2 oo ku wareeji wadarta ugu dhow si aad u hesho qiimaha furitaanka albaabka (tusaale ahaan: 1690÷2=845mm, oo ah 800 albaab oo furan)