TOPIC: Conditional Fields

I have an event coming up on a Friday and Saturday.

I have two different events for Individual Registration and Couples Registration.

I setup a conditional field checkbox for the person to choose Friday OR Saturday
attendance but I can't split my price in half for each night.

1 person = $20 for one night or $30 for both nights
1 couple = $35 for one night or $55 for both nights

Is this possible to do? I'm thinking it may require more conditional fields. Like if a couple just chooses Saturday it would pull the $35 price from another conditional field?? And if they choose both then yet another conditional field to total because its not simple addition of the two days?
Am I on the right track or is there a simpler way?