Build a bulk upload filie for Big Commerce

I would like to do a bulk upload of our roughly 2,000 products to Big Commerce. I have an excel spreadsheet with most of the raw information (Sku, Name, Size, Price, Image URL, Category, Etc.) but I need to incorporate that information into their upload file. I also need the "Rules" in Big Commerce to adjust for the price change on sizes and finish. Each size (we have about 12 option sets for the sizes) needs to have its own "Rule" for the price change. I can create a cheat sheet to help with this. For example, and item is 22" x 4" starts at 9.99 and the next size up for 33" x 6" would add $4. Another product might start at 22" x 14" for a base price of $11.99 and the next size of 33" x 21" would add $4 (this is why we have about 12 different option sets) plus the gloss or matte finish would add $1 for matte. The color options doesn't change the price and the finish option is the same price change for all products, so the only thing needing to change is the size. I have set up a text product for reference here: [login to view URL] I"m happy to clarify anything if this is confusing.