Table:
0
A
B
C
D
E
1
customer id
payment method
customer name
date became customer
other customer details
2
1
Cash
Dr. Julia Wuckert MD
3/1/2018 23:20
3
2
Cheque
Tillman Ernser
2/28/2018 11:37
4
3
Credit Card
Rodrick Heaney
3/9/2018 17:41
5
4
Credit Card
Prof. Alexzander Hamill
2/24/2018 0:20
VIP
6
5
Cheque
Prof. Reyes Berge II
3/7/2018 18:05
7
6
Cash
Maudie Kertzmann
2/26/2018 11:57
8
7
Credit Card
Mozell Morissette
2/25/2018 13:15
VIP
9
8
Credit Card
Eunice Morar
3/21/2018 1:01
10
9
Cheque
Devin Mills
3/5/2018 16:52
11
10
Cash
Kitty Padberg III
3/22/2018 18:09
12
11
Cheque
Salvatore Tillman
3/4/2018 0:17
13
12
Cheque
Clifford Pagac
2/24/2018 10:24
14
13
Credit Card
Miss Aliyah Witting
3/5/2018 7:19
15
14
Cheque
Alexane Kilback
3/8/2018 1:17
16
15
Cash
Prof. Ibrahim Bashirian
3/15/2018 2:54

Questions and formulas:
Question: Find the name of all customers.
Formula: C1
Formula2: C2:C16
Level: easy
Question: What are the names of all the customers?
Formula: C1
Formula2: C2:C16
Level: easy
Question: How many customers are there?
Formula: SUM(A1)
Formula2: SUM(A2:A16)
Level: easy
Question: Return the total number of distinct customers.
Formula: ROWS(UNIQUE(A1))
Formula2: ROWS(UNIQUE(A2:A16))
Level: easy
Question: What are the names of customers who use payment method "Cash"?
Formula: FILTER(C1,B1="Cash")
Formula2: FILTER(C2:C16,B2:B16="Cash")
Level: easy
Question: Which customers use "Cash" for payment method? Return the customer names.
Formula: FILTER(C1,B1="Cash")
Formula2: FILTER(C2:C16,B2:B16="Cash")
Level: easy
Question: Which payment method is used by most customers?
Formula: TAKE(SORT(SUMMARIZE(B1,SUMX(A1)), 2, -1), 1)
Formula2: TAKE(SORT(SUMMARIZE(B2:B16,SUMX(A2:A16)), 2, -1), 1)
Level: hard
Question: What are all the payment methods?
Formula: UNIQUE(B1)
Formula2: UNIQUE(B2:B16)
Level: easy
Question: Return all the distinct payment methods used by customers.
Formula: UNIQUE(B1)
Formula2: UNIQUE(B2:B16)
Level: easy
Question: Find the name of customers who did not pay with Cash.
Formula: FILTER(C1,B1<>"Cash")
Formula2: FILTER(C2:C16,B2:B16<>"Cash")
Level: easy
Question: What is the name of customers who do not use Cash as payment method.
Formula: FILTER(C1,B1<>"Cash")
Formula2: FILTER(C2:C16,B2:B16<>"Cash")
Level: easy