<tbody>
A - Month
B - Date
C - Period
D - Price A
E -Price b
=date(year(B2),month(B2),1)
01/01/2010
1
32.22
33.01
=date(year(B3),month(B3),1)
01/01/2010
2
30.72
31.78
=date(year(B4),month(B4),1)
01/01/2010
3
30.91
30.65
=date(year(B5),month(B5),1)
01/01/210
4
25.91...