Table:
0
A
B
C
D
E
F
G
1
Rk
Name
Country
Matches Played
Matches Won
Points
Prize Money (USD)
2
1
Ken Rosewall
AUS
42
34
53
66400
3
2
Arthur Ashe
USA
36
26
41
63150
4
3
Marty Riessen
USA
36
26
35
47200
5
4
Roger Taylor
GBR
31
21
34
42800
6
4
Mark Cox
GBR
33
23
34
31950
7
6
Brian Fairlie
AUS
32
22
33
30900
8
7
Jan Kodeš
TCH
27
19
28
23800
9
8
Tom Okker
NED
29
19
25
34400
10
9
Roscoe Tanner
USA
27
16
24
25250

Questions and formulas:
Question: What country offered a prize of 66400 US dollars?
Formula: LET(query1,SUMMARIZE(C1,SUMX(G1)),FILTER(query1,CHOOSECOLS(query1,2)=66400))
Formula2: LET(query1,SUMMARIZE(C2:C10,SUMX(G2:G10)),FILTER(query1,CHOOSECOLS(query1,2)=66400))
Level: hard
Question: What country does the player named Mark Cox play for?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:G1,B1="Mark Cox"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:G10,B2:B10="Mark Cox"),3))
Level: medium