Normally, stairway $5.00 per step, floor $5.00 per sqaure yard. As the carpeter itself depening the quality you like. Also, for the floor footage, you need add roughly 10% extra as you need to cut and through some carpeter. * a/ L# U5 z! |9 a3 K+ q) h " c$ ? }# I+ L D+ cThis is just rough idea.