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. $ t5 o, ^/ q: i. E0 O( ~8 j2 F7 a; B+ s
This is just rough idea.