F #1 (1 - 500)
F #2 (501 - 1000)
F #3 (1001 - 1500)
F #4 (1501 - 2000)
F #5 (2001 - 2500)
F #6 (2501 - 3000)
F #7 (3001 - 3500)
F #8 (3501 - 3947)