Expanding upon a previous thread dealing with smallest box size to fit item of known dimensions

[AdvicePlease]

Hi,

Based on this thread: Finding which 4 boxes can hold product X's dimensions
I'm interested in adapting the formula to include multiple units of given products of known dimensions.
For example, say we have 3 box sizes: 15Lx12Wx11H, 17Lx12Wx11H, 19LLx15Wx12H.
Let's say we sell products that differ in size from one another, like 3Lx6Wx4H, 5Lx7Wx3H, and 9Lx4Wx2H.
Depending on the product's price, minimum order quantities of say, 25, 50, 100 units, etc., will apply.
So which is the smallest box we can use for any given product, but also based on the number of units to ship?
Is there a way to adapt the formula outlined on the page accessible via the link above to include a quantity component?

Thanks in advance, whichever, genius takes the initiative to respond.