column display only the 1st value of the month group by store

[#1]

Hi, I currently have this table:

Date	Store	Value
1-Jun	A	4
2-Jun	A	2
3-Jun	A	7
4-Jun	A	3
5-Jun	A	5
1-Jun	B	9
2-Jun	B	3
3-Jun	B	4
4-Jun	B	4
5-Jun	B	8
1-Jun	C	6
2-Jun	C	3
3-Jun	C	9
4-Jun	C	5
5-Jun	C	2

How can I have the 'Value' column to take the 1st day of the month value?:

Store	Value
A	4
B	9
C	6

Thanks.