Lukes assembled monthly production data for Bubbs showing the month, the number of cases produced, and the total production cost.

Month	Cases	Cost
1	195,300	$1,570,196
2	191,921	$1,568,046
3	173,400	$1,494,044
4	195,800	$1,592,674
5	173,200	$1,482,400
6	179,900	$1,545,196
7	190,100	$1,557,890
8	172,900	$1,501,446
9	209,600	$1,631,190
10	201,800	$1,593,149
11	184,000	$1,425,441
12	199,300	$1,626,864

Using the table and the scatter plot identify the month (by number) that is most likely to be an outlier observation.