Ragnar, that was perfectly what i was thinking about, big thanks to you!
Also thank you Lazur for replying

Dear Inkscapers, i've ran out of ideas, so maybe You could help me?
I need to edit this graph into cuboid which will fill all these 3 columns. According to main idea that all those 3 options can be used at once.

Sorry for gramma mistakes, english isn't my native language.
Thanks in advance, Tusiek.