Table:
0
A
B
C
D
E
F
1
Call sign
Frequency MHz
City of license
ERP W
Class
FCC info
2
WVTW
88.5
Charlottesville, Virginia
1,000
B1
FCC
3
WFFC
89.9
Ferrum, Virginia
1,100
A
FCC
4
WQIQ
88.3
Spotsylvania, Virginia
3,500
A
FCC
5
WRIQ
88.7
Lexington, Virginia
3,900
A
FCC
6
WWVT
1260
Christiansburg, Virginia
5,000 day 25 night
D
FCC

Questions and formulas:
Question: Which city of license has a wriq Call sign?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,A1="wriq"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F6,A2:A6="wriq"),3))
Level: medium
Question: What is the total of Frequency MHz with a Class of b1?
Formula: SUMIFS(B1,E1,"b1")
Formula2: SUMIFS(B2:B6,E2:E6,"b1")
Level: easy
Question: Which ERP W has a Class of A, and a Call sign of wffc?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,(E1="a")*(A1="wffc")),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F6,(E2:E6="a")*(A2:A6="wffc")),4))
Level: medium
Question: Which class City of license of ferrum, virginia?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,C1="ferrum, virginia"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F6,C2:C6="ferrum, virginia"),5))
Level: medium
Question: Which call sign has a Class of A, and a Frequency MHz of 88.7?
Formula: LET(query1,LET(query1,FILTER(A1:F1,E1="a"),SUMMARIZE(CHOOSECOLS(query1,1),SUMX(CHOOSECOLS(query1,2)))),FILTER(query1,CHOOSECOLS(query1,2)=88.7))
Formula2: LET(query1,LET(query1,FILTER(A2:F6,E2:E6="a"),SUMMARIZE(CHOOSECOLS(query1,1),SUMX(CHOOSECOLS(query1,2)))),FILTER(query1,CHOOSECOLS(query1,2)=88.7))
Level: hard