Compare date in a range and return sum of 2nd row data array

Hi,

I'm trying to find better way to create formula, that would compare two dates (one is in columns, other in rows) and return sum of second column if date is same and bigger.
See attached example.

Maybe someone has better idea how this formula could be more universal?

Thanks in advance.
View attachment Test.xlsx

Try:

=SUMIF($C$2:$C$17,">="&G$1,$D$2:$D$17)

copied across

Wow thanks Works perfectly.