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. - Q! X) a4 Y* A8 g7 j3 f: b3 b 8 c. i7 E# W, O# J2 ^! VThis is just rough idea.