Table:
0
A
B
C
D
E
1
Year
Artist
Composition
Mintage
Issue Price
2
1998
Pierre Leduc
99.999% pure gold
1,998
$999.99
3
1999
Henry Purdy
99.999% pure gold
1,999
$999.99
4
2000
Caren Heine
99.999% pure gold
2,000
$999.99
5
2001
Bonnie Ross
99.999% pure gold
2,001
$1,019.99
6
2002
Dr. A. K. Hellum
99.999% pure gold
2,002
$1,099.99
7
2003
Pamela Stagg
99.999% pure gold
2,003
$1,099.99
8
2004
Catherine Ann Deer
99.999% pure gold
2,004
$1,099.99
9
2005
Chris Jordison
99.999% pure gold
2,005
$1,295.95
10
2006
Susan Taylor
99.999% pure gold
2,006
$1,489.95
11
2007
Sue Rose
99.999% pure gold
1,400
$1,520.95
12
2008
Celia Godkin
99.999% pure gold
1,400
$1,676.95
13
2009
Julie Wilson
99.999% pure gold
1,400
$2,149.95
14
2010
Celia Godkin
99.999% pure gold
1,400
$2,599.95

Questions and formulas:
Question: What was the mintage having an issue price of $1,099.99, artist being Pamela Stagg?
Formula: SUM(FILTER(D1, (E1="$1,099.99")*(B1="pamela stagg")))
Formula2: SUM(FILTER(D2:D14, (E2:E14="$1,099.99")*(B2:B14="pamela stagg")))
Level: easy
Question: What was the year that had an issue price of $1,295.95?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,E1="$1,295.95"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E14,E2:E14="$1,295.95"),1))
Level: medium
Question: What is the composition with an artist of Henry Purdy, a year smaller than 2002, and a mint more than 1,998?
Formula: LET(query1,LET(query1,FILTER(A1:E1,(A1<2002)*(B1="henry purdy")),SUMMARIZE(CHOOSECOLS(query1,3),SUMX(CHOOSECOLS(query1,4)))),FILTER(query1,CHOOSECOLS(query1,2)>1998))
Formula2: LET(query1,LET(query1,FILTER(A2:E14,(A2:A14<2002)*(B2:B14="henry purdy")),SUMMARIZE(CHOOSECOLS(query1,3),SUMX(CHOOSECOLS(query1,4)))),FILTER(query1,CHOOSECOLS(query1,2)>1998))
Level: hard
Question: What was the average mintage for that of artist Celia Godkin, before the year 2010?
Formula: AVERAGE(FILTER(D1, (B1="celia godkin")*(A1<2010)))
Formula2: AVERAGE(FILTER(D2:D14, (B2:B14="celia godkin")*(A2:A14<2010)))
Level: easy