The configurator for cutting 1050 aluminum plate does not allow me to create a plate thickness 8 mm in size in mm 80 wide by 310 long, it demands a minimum width of 100 mm, I would waste material.
If it has only one side with measurement less than 100mm just enter this measurement in the first "length" box.
To check the minimum/maximum length allowed on the two sides press on the blue "i" next to each reference.