How can I set automatic variant pricing for different shoe sizes and widths?

I have a shoe store, which offers shoes from 5 - 17 including 1/2 sizes in 3 widths. I use variant1 as the size and variant2 is the widths. 1 product has a total of 75 variants per.

I am using dawn 2.0 theme

I would like to make a static entry for size and width to auto add per product.

I would like to make it so the EEE width has a fixed price increase over the others.

I am basic user to Shopify and coding.

Thank you,

Mitchell