Table:
0
A
B
C
D
E
F
G
1
Rnd
Circuit
GTO Winning Team
GTU Winning Team
TO Winning Team
TU Winning Team
Results
2
1
Virginia
#57 Corvette
#59 Brumos Porsche - Audi
#21 Javelin
#71 Opel
Results
3
1
Virginia
Dave Heinz
Peter Gregg Hurley Haywood
Robert Hennig Richard Staples
Amos Johnson Roger Mandeville Bunny Diggett
Results
4
2
Alabama
#57 Corvette
#59 Brumos Porsche - Audi
#21 Javelin
#21 Mini
Results
5
2
Alabama
Dave Heinz
Peter Gregg Hurley Haywood
Robert Hennig
Joe Richardson
Results
6
3
Charlotte
#57 Corvette
#59 Brumos Porsche - Audi
#21 Javelin
#64 Mini
Results
7
3
Charlotte
Dave Heinz Or Costanzo
Peter Gregg Hurley Haywood
Robert Hennig Bob Beasley
Anthony Milne Richard Stevens
Results
8
4
Bridgehampton
#18 Es-Pa Racing
#59 Brumos Porsche - Audi
#84 Camaro
#85 Alfa Romeo
Results
9
4
Bridgehampton
Rodney Harris John Paul Sr.
Peter Gregg Hurley Haywood
George Lisberg Ray Cuomo
Walt Simendinger Bob Heiberg
Results
10
5
Summit Point
#49 Mustang
#59 Brumos Porsche - Audi
#42 Camaro
#93 Jerry Walsh
Results
11
5
Summit Point
Lee McDonald Albert Pentrillo
Peter Gregg Hurley Haywood
Steve Ross
Jerry Walsh Lee Wiese
Results
12
6
Daytona
#57 Corvette
#34 911
#3 Camaro
#11 2002
Results

Questions and formulas:
Question: Who was the TO winning team when the TU winning team was Joe Richardson? 
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:G1,F1="Joe Richardson"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:G12,F2:F12="Joe Richardson"),5))
Level: medium
Question: On what circuit was the GTU winning team #59 Brumos Porsche - Audi in round 5? 
Formula: LET(query1,LET(query1,FILTER(A1:G1,D1="#59 Brumos Porsche - Audi"),SUMMARIZE(CHOOSECOLS(query1,2),SUMX(CHOOSECOLS(query1,1)))),FILTER(query1,CHOOSECOLS(query1,2)=5))
Formula2: LET(query1,LET(query1,FILTER(A2:G12,D2:D12="#59 Brumos Porsche - Audi"),SUMMARIZE(CHOOSECOLS(query1,2),SUMX(CHOOSECOLS(query1,1)))),FILTER(query1,CHOOSECOLS(query1,2)=5))
Level: hard
Question: Who was the GTU winning team when the TO winning team was #3 Camaro? 
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:G1,E1="#3 Camaro"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:G12,E2:E12="#3 Camaro"),4))
Level: medium
Question: Who was the GTU winning team when the TO winning team was Steve Ross? 
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:G1,E1="Steve Ross"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:G12,E2:E12="Steve Ross"),4))
Level: medium
Question: Who was the GTO winning team in round 5 when the GTU winning team was #59 Brumos Porsche - Audi? 
Formula: LET(query1,LET(query1,FILTER(A1:G1,D1="#59 Brumos Porsche - Audi"),SUMMARIZE(CHOOSECOLS(query1,3),SUMX(CHOOSECOLS(query1,1)))),FILTER(query1,CHOOSECOLS(query1,2)=5))
Formula2: LET(query1,LET(query1,FILTER(A2:G12,D2:D12="#59 Brumos Porsche - Audi"),SUMMARIZE(CHOOSECOLS(query1,3),SUMX(CHOOSECOLS(query1,1)))),FILTER(query1,CHOOSECOLS(query1,2)=5))
Level: hard
Question: Who was the GTO winning team when the TO winning team was #84 Camaro? 
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:G1,E1="#84 Camaro"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:G12,E2:E12="#84 Camaro"),3))
Level: medium