month	sales	adver	
1	12.0	15
2	20.5	16
3	21.0	18
4	15.5	27
5	15.3	21
6	23.5	49
7	24.5	21
8	21.3	22
9	23.5	28
10	28.0	36
11	24.0	40
12	15.5	3
13	17.3	21
14	25.3	29
15	25.0	62
16	36.5	65
17	36.5	46
18	29.6	44
19	30.5	33
20	28.0	62
21	26.0	22
22	21.5	12
23	19.7	24
24	19.0	3
25	16.0	5
26	20.7	14
27	26.5	36
28	30.6	40
29	32.3	49
30	29.5	7
31	28.3	52
32	31.3	65
33	32.2	17
34	26.4	5
35	23.4	17
36	16.4	1