Although the U.S. Bureau of Labor Statistics (BLS) does not provide information specific to the field of global marketing, the BLS did project that the employment of marketing managers will likely grow by about 12% between 2012 and 2022, a rate consistent with the average predicted for all occupations.
Divide the height of the staircase in inches by the intended rise of each step, also in inches, to assist in determining the stair stringer length. The riser height is up to you, though most building codes will not allow a height larger than 7 3/4 inches.
This will put the end of your stair stringers out at 126 3/4, and when you add your 3/4 thick riser and 1/2 nosing on the stair tread, you will have a finished run of 128. If the noising of the tread can stick out for a total finished run of 131 1/4 then you could cut your stringers to have a 10 run. Also, don't forget to drop the riser height of the first step by the thickness of the tread material and to reduce the run of the topmost step the thickness of the riser material.