Table:
0
A
B
C
D
E
1
Number
Artist
Album
1st week sales
1st week position
2
1
Kanye West
Graduation
957,000
#1
3
2
50 Cent
Curtis
697,000
#2
4
3
T.I.
T.I. vs. T.I.P.
468,000
#1
5
4
Jay-Z
American Gangster
426,000
#1
6
5
Fabolous
From Nothin' to Somethin'
159,000
#2
7
6
Common
Finding Forever
158,000
#1
8
7
Lupe Fiasco
The Cool
143,000
#14
9
8
Young Buck
Buck the World
141,000
#3
10
9
Timbaland
Shock Value
138,000
#1
11
10
Bone Thugs-N-Harmony
Strength & Loyalty
119,000
#2

Questions and formulas:
Question: What is the 1st week sales for the album finding forever before the number 6?
Formula: SUM(FILTER(D1, (C1="finding forever")*(A1<6)))
Formula2: SUM(FILTER(D2:D11, (C2:C11="finding forever")*(A2:A11<6)))
Level: easy
Question: What is the album for the number 6 with the 1st week position of #1?
Formula: LET(query1,LET(query1,FILTER(A1:E1,E1="#1"),SUMMARIZE(CHOOSECOLS(query1,3),SUMX(CHOOSECOLS(query1,1)))),FILTER(query1,CHOOSECOLS(query1,2)=6))
Formula2: LET(query1,LET(query1,FILTER(A2:E11,E2:E11="#1"),SUMMARIZE(CHOOSECOLS(query1,3),SUMX(CHOOSECOLS(query1,1)))),FILTER(query1,CHOOSECOLS(query1,2)=6))
Level: hard