Packaging Net

So the packaging for Hannah needs to fit A3 sized sheets inside. She has measured the amount of work she has and has told me the depth needs to be 12cm in total.This is split into 3 separate sections so 4cm each.

Here is the net I have created for the 3 inside boxes along with the measurements i've calculated. 

The stock i have ordered comes at 720mm x 1020mm which is perfect!