create variable pricing in shopify

Looking for shopify expert to help me create variable pricing. Our site is a game-leveling website. 1. Each level has a fixed experience number (which will be provided per level - 99 total) 2. The price should be calculated with 2 inputs, The current level, and the desired level. Formula for pricing should work like this. A = Current level B = Desired Level C = price base number per Exp (Will provide this number) B - A = experience remaining x C = price for customer If you can create this variable pricing, please message or respond to this message. Do not solicit services or message if you can not complete this task.