@@wanderindog732 you have to use the boxes and shelves at the far back corner near the exit door. I found a good tutorial vid that shows it. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-mV_lQ59lscU.html
I did it without cheats, sounds like a skill issue, even if you miss the first jump you can always jump form the shelf under it i managed to get up on the topshelf