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. 4 ]( X9 p; h7 m* {& F9 ?0 s" C 1 j. T6 ]% U6 J& e% {% \( {7 ]/ WThis is just rough idea.