Need help in creating a Report using two different table data

Hi folks,
I'm trying to create a summary report (Group column by month and Employee name )using two tables that as one field in common.
Note: The actual hour and Estimated hour mentioned below are summary fields 
Table 1:                                                                                                      

Record ID (key)	Name	Project	Month	week#	Actual Hours	Common Field (formula)
000001	Abc	P1	Apr	1	10	Abc-P1-Apr
000002	Abc	P2	Apr	1	20	Abc-P2-Apr
000001	Abc	P1	Apr	2	5	Abc-P1-Apr
000002	Abc	P2	Apr	2	15	Abc-P2-Apr
000001	Def	P1	Apr	1	10	Def-P1-Apr
000002	Def	P2	Apr	1	20	Def-P2-Apr
000001	Def	P1	Apr	2	5	Def-P1-Apr
000002	Def	P2	Apr	2	15	Def-P2-Apr
000002	Abc	P2	May	1	40	Abc-P2-May
000001	Def	P1	May	1	30	Def-P1-May

Table 2:

Record ID (key)	Name	Project	Month	Estimated  Hours	Common Field (formula)
0000011	Abc	P1	Apr	10	Abc-P1-Apr
0000021	Abc	P2	Apr	20	Abc-P2-Apr
0000031	Abc	P1	May	15	Abc-P1-May
0000041	Def	P2	Apr	30	Def-P2-Apr
0000041	Def	P2	May	30	Def-P2-May

Can someone please help me in creating a report as mentioned below 
Summary Report:

Name	Project	Month	Estimated Hours	Actual Hours (summary of all weeks of the project)
Abc	P1	Apr	10	15
Abc	P2	Apr	20	35
Def	P1	Apr	0	15
Def	P2	Apr	30	35
Abc	P2	May	0	40
Def	P1	May	0	30
Abc	P1	May	15	0
Def	P2	May	30	0

Thanks in Advance!

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Mahe
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