Table:
0
A
B
C
D
E
F
1
Call sign
Frequency MHz
City of license
ERP W
Class
FCC info
2
K217EZ
91.3
Coachella, California
10
D
FCC
3
K217EF
91.3
Desert Center, California
10
D
FCC
4
K251AH
98.1
Grand Terrace, California
8
D
FCC
5
K242BR
96.3
Indio, California
10
D
FCC
6
K225AO
92.9
Lompoc, California
5
D
FCC
7
K208DA
89.5
Los Banos, California
10
D
FCC
8
K295AI
106.9
Muscoy, California
7
D
FCC
9
K238BB
95.5
Palm Springs, California
6
D
FCC
10
K252EI
98.3
Rialto, California
30
D
FCC
11
K217CQ
91.3
Salinas, California
10
D
FCC
12
K211DK
90.1
Santa Ana, California
10
D
FCC
13
K240AK
95.9
Soledad, California
27
D
FCC
14
K219DK
91.7
Victorville, California
10
D
FCC
15
K279BE
103.7
Bakersfield, California
99
D
FCC
16
K293BG
106.5
Cambria, California
10
D
FCC
17
K239AZ
95.7
Lake Isabella, California
10
D
FCC
18
K212DL
90.3
Rosamond, California
250
D
FCC
19
K269EW
101.7
Santa Maria, California
10
D
FCC

Questions and formulas:
Question: What call sign has a frequency of 91.3 MHz?
Formula: LET(query1,SUMMARIZE(A1,SUMX(B1)),FILTER(query1,CHOOSECOLS(query1,2)=91.3))
Formula2: LET(query1,SUMMARIZE(A2:A19,SUMX(B2:B19)),FILTER(query1,CHOOSECOLS(query1,2)=91.3))
Level: hard
Question: What city of license has a value of k293bg for its call sign?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,A1="k293bg"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F19,A2:A19="k293bg"),3))
Level: medium
Question: When the frequency is 103.7 MHz and the ERP W is more than 10, what is the call sign?
Formula: LET(query1,SUMMARIZE(A1,SUMX(D1),SUMX(B1)),FILTER(query1,(CHOOSECOLS(query1,2)>10)*(CHOOSECOLS(query1,3)=103.7)))
Formula2: LET(query1,SUMMARIZE(A2:A19,SUMX(D2:D19),SUMX(B2:B19)),FILTER(query1,(CHOOSECOLS(query1,2)>10)*(CHOOSECOLS(query1,3)=103.7)))
Level: hard
Question: In Los Banos, California, when the ERP W is than 10, what is the average Frequency MHz?
Formula: AVERAGE(FILTER(B1, (C1="los banos, california")*(D1<10)))
Formula2: AVERAGE(FILTER(B2:B19, (C2:C19="los banos, california")*(D2:D19<10)))
Level: easy
Question: What is the call sign when the frequency is less than 95.5 MHz, and a ERP W is higher than 10?
Formula: LET(query1,SUMMARIZE(A1,SUMX(B1),SUMX(D1)),FILTER(query1,(CHOOSECOLS(query1,2)<95.5)*(CHOOSECOLS(query1,3)>10)))
Formula2: LET(query1,SUMMARIZE(A2:A19,SUMX(B2:B19),SUMX(D2:D19)),FILTER(query1,(CHOOSECOLS(query1,2)<95.5)*(CHOOSECOLS(query1,3)>10)))
Level: hard