Normally, stairway $5.00 per step, floor $5.00 per sqaure yard. As the carpeter itself depening the quality you like. Also, for the floor footage, you need add roughly 10% extra as you need to cut and through some carpeter. ( w6 i/ J& n9 o$ q$ m% o+ ]: ]3 ?+ A: E8 q+ w% F8 T( ~, Q F
This is just rough idea.