I assume that cost is the chief issue here.
i.e. "What is the least cost to pack everything?"
This involves box cost, labor and shipping.
If this is your goal, there's not enough data here.
Otherwise, maybe your question  might be "What is the least amount of
containers?" (mix unimportant)
or similar ...
If you solve this, I'd be interested in the solution via macro or formula.
For only 3 products, it's not too bad, but I assume you want to
generalize to "n" products.