Table:
0
A
B
C
D
E
F
1
Call sign
Frequency MHz
City of license
ERP W
Class
FCC info
2
W247AQ
97.3
Tropical Gulf Acres, Florida
25
D
FCC
3
W244BK
96.7
Twentymile Bend, Florida
80
D
FCC
4
W252BB
98.3
Vero Beach, Florida
13
D
FCC
5
W220DZ
91.9
Wesley Chapel, Florida
8
D
FCC
6
W220DU
91.9
West Deerfield Beach, Florida
80
D
FCC
7
W299AU
107.7
Zolfo Springs, Florida
19
D
FCC

Questions and formulas:
Question: What city of license is associated with call sign w244bk?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,A1="w244bk"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F7,A2:A7="w244bk"),3))
Level: medium
Question: What city of license has a Frequency under 107.7, and a call sign of w247aq?
Formula: LET(query1,LET(query1,FILTER(A1:F1,A1="w247aq"),SUMMARIZE(CHOOSECOLS(query1,3),SUMX(CHOOSECOLS(query1,2)))),FILTER(query1,CHOOSECOLS(query1,2)<107.7))
Formula2: LET(query1,LET(query1,FILTER(A2:F7,A2:A7="w247aq"),SUMMARIZE(CHOOSECOLS(query1,3),SUMX(CHOOSECOLS(query1,2)))),FILTER(query1,CHOOSECOLS(query1,2)<107.7))
Level: hard