Table:
0
A
B
C
D
E
F
G
1
Week
Date
Opponent
Result
Record
Streak
Attendance
2
1
Sept. 19
vs. Dallas Cowboys
Loss 49-37
0-1
L1
46,206
3
2
Sept. 26
vs. Miami Dolphins
Loss 29-14
0-2
L2
45,139
4
3
Oct. 3
at Minnesota Vikings
Loss 19-0
0-3
L3
47,900
5
4
Oct. 10
vs. Baltimore Colts
Loss 43-0
0-4
L4
46,206
6
5
Oct. 17
at New York Jets
Loss 28-17
0-5
L5
61,948
7
6
Oct. 23
at San Diego Chargers
Loss 20-3
0-6
L6
49,261
8
7
Oct. 31
vs. St. Louis Cardinals
Loss 28-23
0-7
L7
40,040
9
8
Nov. 7
at Miami Dolphins
Loss 34-0
0-8
L8
61,016
10
9
Nov. 14
at New England Patriots
Loss 38-33
0-9
L9
57,446
11
10
Nov. 21
vs. New York Jets
Loss 20-7
0-10
L10
41,577
12
11
Nov. 28
vs. New England Patriots
Win 27-20
1-10
W1
27,166
13
12
Dec. 5
at Baltimore Colts
Loss 24-0
1-11
L1
58,476
14
13
Dec. 12
vs. Houston Oilers
Loss 20-14
1-12
L2
28,107
15
14
Dec. 19
at Kansas City Chiefs
Loss 22-9
1-13
L3
48,121

Questions and formulas:
Question: What was the week number when they played on Dec. 19?
Formula: SUMIFS(A1,B1,"dec. 19")
Formula2: SUMIFS(A2:A15,B2:B15,"dec. 19")
Level: easy