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.9 z C- }' w8 i8 @: A3 ? b9 D
+ V, T5 u8 q9 j/ z8 w
This is just rough idea.