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./ M" J& P# N* [7 l
$ }6 R$ }- w r" X1 H5 S1 `
This is just rough idea.