Add a 3rd lookup to a formula with 2 current matches

Hi all, a while back one of you gave me an awesome formula that pulls data from sheet 2 based on what was typed in A1 and A2 on sheet 1.

Well I ran into a snag, is there a way we can add a 3rd match in the formula. See the attached file.

I need to pull data from sheet 2 based on what is typed on sheet 1 in cell A1, A2 and A3.

Exp
Sheet 1, report to be printed
A1 = last name
A2 = first name
A3 = month

Sheet 2, data is held here
Need to pull data in column “M”


Thanks for the help

MS Excel 2002 SP3
Windows XP Pro