Variation Price based on Percentage

I am looking for a woocommerce solution for allowing a variation on a variable product to have price based on a percentage. I sell custom items and a component of some items use materials whose cost changes based on the size of the item. Other options that may be applied will also affect the amount of some materials used. I have a huge amount of variations and options and have looked at various bulk variation managers. The bulk variation managers that I have found ultimately use only static prices.

Example:
Item Size
-- Small $10
-- Medium $20
-- Large $30
Add-ons
-- Add-on #1 $3
-- Add-on #2 $5
-- Add-on #3 $8
Percentage Addon
-- Dynamic #1 5%
-- Dynamic #2 10%
-- Dynamic #3 15%

Using the above example, A SMALL item with ADD-ON #1 would total $15. By selecting DYNAMIC ADD-ON #2, the total price would be ($10+$5)x1.1 = $16.50.

Any suggestions would be greatly appreciated.

Also I am very much a novice with WP, please be detailed when providing code alterations and file locations.

Thank you