Table:
0
A
B
C
D
E
F
G
H
I
1
booking id
customer id
workshop group id
status code
store id
order date
planned delivery date
actual delivery date
other order details
2
1
938
140
good
8
12/12/2016 10:43
3/10/2013 18:47
11/21/1997 10:07
3
2
868
838
stop
7
8/20/1976 0:33
7/9/2009 9:18
1/8/1976 7:19
4
3
735
176
good
9
11/23/1975 6:28
1/5/1989 19:24
3/16/1990 19:38
5
4
527
708
stop
6
2/2/1995 15:52
4/27/2017 0:16
10/24/1996 21:15
6
5
591
176
good
9
5/10/1995 14:49
7/19/1979 19:44
1/13/1971 13:24
7
6
953
735
good
1
11/26/1992 18:11
6/6/2016 20:35
4/30/2016 11:45
8
7
735
954
stop
4
12/30/1975 14:12
7/18/2008 18:15
10/9/1983 10:48
9
8
605
176
good
2
5/11/1992 23:22
4/2/1973 3:10
7/1/1983 22:10
10
9
508
405
good
4
5/11/1971 6:53
5/7/1974 21:40
10/4/1986 13:31
11
10
938
735
good
4
5/19/1982 5:37
5/11/1999 1:26
11/17/1989 0:32
12
11
423
136
good
4
10/11/1991 17:24
4/10/1978 12:23
2/7/1983 20:27
13
12
776
954
good
5
12/17/1984 12:53
6/5/2014 10:19
9/2/1985 11:34
14
13
605
685
good
6
9/14/1996 10:17
4/17/1993 23:53
4/18/1982 2:59
15
14
426
954
stop
6
8/5/2007 15:46
6/29/1971 3:04
12/21/1995 5:01
16
15
426
176
stop
8
10/24/1976 7:40
6/25/1972 15:51
2/22/2004 4:37

Questions and formulas:
Question: How many bookings were completed?
Formula: SUM(A1)
Formula2: SUM(A2:A16)
Level: easy
Question: Number of bookings confirmed.
Formula: SUM(A1)
Formula2: SUM(A2:A16)
Level: easy
Question: What's the order date and booking id?
Formula: UNIQUE(HSTACK(F1,A1))
Formula2: UNIQUE(HSTACK(F2:F16,A2:A16))
Level: easy
Question: Date when each booking ordered.
Formula: UNIQUE(HSTACK(F1,A1))
Formula2: UNIQUE(HSTACK(F2:F16,A2:A16))
Level: easy
Question: Show actual delivery dates, booking ids and planned delivery dates
Formula: UNIQUE(HSTACK(G1,H1,A1))
Formula2: UNIQUE(HSTACK(G2:G16,H2:H16,A2:A16))
Level: easy
Question: When was each booking delivered as planned and actually?
Formula: UNIQUE(HSTACK(G1,H1,A1))
Formula2: UNIQUE(HSTACK(G2:G16,H2:H16,A2:A16))
Level: easy
Question: What is the actual delivery date, booking id and planned delivery date?
Formula: UNIQUE(HSTACK(G1,H1,A1))
Formula2: UNIQUE(HSTACK(G2:G16,H2:H16,A2:A16))
Level: easy
Question: Most general booking status.
Formula: TAKE(SORT(SUMMARIZE(D1,SUMX(A1)), 2, -1), 1)
Formula2: TAKE(SORT(SUMMARIZE(D2:D16,SUMX(A2:A16)), 2, -1), 1)
Level: hard