set up store with multiple sizes, colors and prices 7.1

I have a client who has many products with many variants for each product.

I need to know how to set the variants up so that the customer can choose up to thirty options/variants and see the changing price as they choose different options.

I can do it with two variants but after more than two (and, as said there are many more than two)

This screenshot way below shows ONE product she needs all these variables for. I know. Nuts.

And the client wants to use a fulfillment service that isn't an SQSP extension so that is even more complicated.

I do have this from SQSP Support:

Quote

 

Let's pretend that I have two different color options, like you do: Green and Purple. Let's also pretend I have three sizes, and each one larger than small comes with a modifier to the base price (let's say $50) that I decided on my own: +$20 for medium and +$50 for large. Now let's say I have framed and unframed, and framed adds +$100 to the price of the product, again because I said so (I obviously have no experience pricing items in the industry, but thanks for following along for the sake of the example).
 
I can't just set the rule that Medium adds $20, Large adds $50, and frames add $100 and the system will automatically do the math for me by adding $50 and $100 for all combinations with those options. Instead, I have to do the math on my own, in my head or with a calculator, for each unique combination, and enter it in as the value for that unique combination of options. 
 
This is what I mean when I say the system isn't doing the math. It's simply looking at the combination of options, and then it pulls what the price you set as the total for that particular combination of options is (So a large framed item is $200, not because it's adding the modifier for  for large ($50) and framed ($100), but because that's what I said a large framed green item and a large framed purple item is). It's not doing algebra based on rules I have set for each option. That's also why the price doesn't change until every single option is selected, so if you leave one option unselected it won't update the price because you haven't chosen a possible unique comb

 

ANY thoughts, or suggestions on this I would really appreciate.

All My Best,
George Cartwright