How can I get combination base price when logged in a customer group with specific prices?

[hotnunstar]

In my store, almost all the products are combinations and I have 5 different customer groups.

All products have different prices for each customer group and the default price is for customer group 1.

I need to show the default price and the customer group price inside product page. How can I reach that? I've tried get getSpecificPrice, getPrice, Combination::getPrice, etc but the only thing that I could get near the point was the combination impact.

 

Someone already had the same problem and could solve it?