Multiple Product Order Form With Price Lookup

On an order form the customer will be able to enter the width and projection of several products that they want to order. The way these products are priced are in a Matrix of Width over projection. The current system i have designed is:

1. The pricing Matrix's have all been put into one big table and given a unique id per product matrix.
2. An advanced filter has then been run and and it extracts the appropriate matrix and copies it onto the process sheet.
3. An Index/Match formula is used to find the price for the inputted width and projection. It does this by finding the intersect point of the width and projection on the table.

Currently this will be put into a macro and assigned to a button.

The problem is that up to 15 (or possibly more) products need to be able to be ordered in one order form. With the current system it means there will be a lot of Advanced Filters and there will be a macro button that will need to be clicked after every product order (and they're could be 15 or more). Obviously this isn't very professional, it is time consuming and must be the hard way of doing it.

I was wondering what over systems that could be used for this sort of thing. The more solutions there are to this problem the better. Attached is the file. If you do post a solution it would be preferred if you could also post a file with a working example in. I find it much easier to learn the solution if i can see it working.