Excuse me if this has been discussed before....

"R" class is a subset of F, only used for elite upgrade to FC, correct?

Do a FC fare search 2/20-2/27 BOS-LAX

Northwest Airlines 345

Booking Class: R
Fare Basis Code: R2PBF
Ticket Designator:
Sun, Feb 20
2hr 16min
8:45am Depart Boston (BOS)
11:01am Arrive Detroit (DTW)

Northwest Airlines 433

Booking Class: R
Fare Basis Code: R2PBF
Ticket Designator:
Sun, Feb 20
4hr 54min
12:09pm Depart Detroit (DTW)
2:03pm Arrive Los Angeles (LAX)

Northwest Airlines 332

Booking Class: R
Fare Basis Code: R2PBF
Ticket Designator:
Sun, Feb 27
4hr 24min
8:25am Depart Los Angeles (LAX)
3:49pm Arrive Detroit (DTW)

Northwest Airlines 1226

Booking Class: R
Fare Basis Code: R2PBF
Ticket Designator:
Sun, Feb 27
1hr 48min
4:56pm Depart Detroit (DTW)
6:44pm Arrive Boston (BOS)

Total FC fare: $1,028

I am confused. So "R" could be a cheap First Class fare for sale too?