Different Provider Prices for Different Services

Currently the appointments+ plugin has this field in the admin for additional price. This field basically has no purpose what so ever and does not update the price at all. In the real world different providers have different prices for each services and can't simply put $50 as an additional price. They also can't just put 10% more or something like that. I need to let my providers enter a price for each service or tell me what price and I can put it in admin. I would love if they could do it on the frontend. I don't even need the admin to set a default price because there will be no default price. This is a vital feature that your plugin needs and you should remove the additional field option in the admin and just add a text box next to each services to let provider price be different for every service. Please help me accomplish this much needed mod.