Markup and Profit margin / MU function in your electronic calculator ( Answer )

[Kiriakos GR]

By getting my new digital calculator started to investigate all it features.
Unfortunately the instructions manual were lost, and this model was the last available in stock.

My calculator is an 12 digit large size one, I was searched to find any instruction manual of an 12 digit electronic calculator and the file bellow gave me most of the answers  except  the actual functionality of MU  multiple use key (keys sequence).

I am offering the valuable information by pictures.
Most answers over internet are over the theory than the actual key pressing for Markup MU,  and by the information provided by these pictures, now you may conduct  even discount calculations by the MU key.

http://files.sharpusa.com/Downloads/ForHome/HomeOffice/Calculators/Manuals/cal_man_QS2130.pdf