database of the Department of salaries

I have a database of the Department of salaries and have a history of each salary schedule, but there are more more data one month example :

date name description amount
2012-5-1 ali saler 2000$
2012-5-4 ali mobile bill 140$
2012-5-4 ali Rent housing 120$
2012-4-4 ali Rent housing 120$
2012-4-4 ali Rent housing 120$

2012-4-4 ali Rent housing 120$

Needed for each month that the total salary ..
AND each month print line in the end

thank you

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