Hello, can someone help me with Vlookup please ?

I have a large table with dates (decreasing monthly) in column A, and debt
(also decreasing) in column F.

I want to lookup the date at which the debt falls to zero (or goes
negative), but Vlookup uses the first column as its 'search value' while I
need it to search in column F.

I could copy the dates to a new column G and search the array F1:G500, but
is there a more elegant way of doing this ?

Thanks

K