Pricelist - always pick the lowest price for customer

I have 2 pricelists:

1. Default one - has 20% discount on product sale price

2. VIP - formula, they pay cost price +10%

I want VIP customers to never pay more then regular customers. For example, product has sale price of 50, and cost price of 40.

This means that default customers will pay 40, and VIP will result in 44.
If I add a rule on VIP pricelist that inherits from default pricelist, it then ignores the other line with the VIP formula.

What is the configuration needed to verify VIP customer always pays the lowest price between the two?