You need to build that string. There is a great example of it here:
It used the PREVIOUS_VALUE function to walk through the table and pick out the unique values, and append them to an ever-growing string. The last one in the list is the complete list.
I'll let you give it a try first. If you can't get it to work, let me know.
Attached is a working example of this in your workbook.
Give it a try first. Best way to learn this. But in the attached I have a sheet with the 3 dimensions, and in the labels I display three different strings -- one for each dimension. In the title I have a final string for Shipping (by doing a WINDOW_MAX of the shipping list.) You'll do the same for the other two.