Table:
0
A
B
C
D
E
F
G
1
Episode Air Date
Audition City
Date
First Audition Venue
Callback Date
Callback Venue
Golden Tickets
2
January 15, 2008
Philadelphia, Pennsylvania
August 27, 2007
Wachovia Center
September 1–2, 2007
Hyatt Regency
29
3
January 16, 2008
Dallas, Texas
August 6, 2007
Texas Stadium
September 20–23, 2007
W Hotel Dallas Victory
24
4
January 22, 2008
San Diego, California
July 30, 2007
Qualcomm Stadium
September 12–13, 2007
Rancho Bernardo Inn
31
5
January 23, 2008
Charleston, South Carolina
August 18, 2007
North Charleston Coliseum
September 6–7, 2007
Charleston Area Convention Center
23
6
January 29, 2008
Omaha, Nebraska
August 10, 2007
Qwest Center Omaha
October 5–6, 2007
Qwest Convention Center
19
7
January 30, 2008
Miami, Florida
August 22, 2007
American Airlines Arena
September 29–30, 2007
JW Marriott Hotel
17
8
February 5, 2008
Atlanta, Georgia
August 14, 2007
Georgia Dome
October 8–10, 2007
Georgia International Convention Center
21

Questions and formulas:
Question: Which city had the charleston area convention center as its callback location
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:G1,F1="Charleston Area Convention Center"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:G8,F2:F8="Charleston Area Convention Center"),2))
Level: medium
Question: When did the callbacks from  rancho bernardo inn air
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:G1,F1="Rancho Bernardo Inn"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:G8,F2:F8="Rancho Bernardo Inn"),1))
Level: medium