I cant seem to get my head around SUMIFS and VLOOKUP,
Im currently using:
=SUMIF('Gas July'!$B$2:$D$217, VLOOKUP($A3, 'Gas July'!$B$2:$D$217, 1, FALSE), 'Gas July'!$D$2:$D$217)
Which points to a sheet with only July Data and multiple sites and it gives me the number I want (total usage for...