Hi,
I guess you have missed the date column in your sample file.
Supposed your dates are in column D, try this:
=INDEX($D$2:$D$5,MATCH(A13&B13,INDEX($A$2:$A$5&$B$2:$B$5,),0))
If no duplicate, try this:
=SUMIFS($D$2:$D$5,$A$2:$A$5,A13,$B$2:$B$5,B13)
Regards,