I have a Southwest "wanna get away" flight coming up this month. It's cancelable for a flight credit, but not refundable. If I upgrade to the "business select" fare class I receive a refundable ticket. Here's my question: If I do upgrade to business select and request a refund, will I get a refund for my entire ticket price? Or will I get refunded for the fare upgrade cost and a flight credit for the original cost.

Thank you all for tackling this one!