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. : J9 d7 b( o' ?/ C7 u 5 u8 N1 ^/ z& k* N) \) cThis is just rough idea.