Filling to the right so I don't have to edit four parts of the formula 350 times!

Hello,

I have this huge formula and I want to run it in one row, across 350 columns:

=IF(IF(ISERROR(INDEX('Allocated & Spent'!$G$11:$G$307,SMALL(IF('Allocated & Spent'!$F$11:$F$307="x",ROW('Allocated & Spent'!$G$11:$G$307)),ROW(3:3))-10,1)),"",INDEX('Allocated & Spent'!$G$11:$G$307,SMALL(IF('Allocated & Spent'!$F$11:$F$307="x",ROW('Allocated & Spent'!$G$11:$G$307)),ROW(3:3))-10,1))="","/////",IF(ISERROR(INDEX('Allocated & Spent'!$G$11:$G$307,SMALL(IF('Allocated & Spent'!$F$11:$F$307="x",ROW('Allocated & Spent'!$G$11:$G$307)),ROW(3:3))-10,1)),"",INDEX('Allocated & Spent'!$G$11:$G$307,SMALL(IF('Allocated & Spent'!$F$11:$F$307="x",ROW('Allocated & Spent'!$G$11:$G$307)),ROW(3:3))-10,1)))

The only thing I need to change from one column to the next is the four places where it says ROW(3:3). I need that to ratchet up as it goes across to the next. The cell to the right should say:

=IF(IF(ISERROR(INDEX('Allocated & Spent'!$G$11:$G$307,SMALL(IF('Allocated & Spent'!$F$11:$F$307="x",ROW('Allocated & Spent'!$G$11:$G$307)),ROW(4:4))-10,1)),"",INDEX('Allocated & Spent'!$G$11:$G$307,SMALL(IF('Allocated & Spent'!$F$11:$F$307="x",ROW('Allocated & Spent'!$G$11:$G$307)),ROW(4:4))-10,1))="","/////",IF(ISERROR(INDEX('Allocated & Spent'!$G$11:$G$307,SMALL(IF('Allocated & Spent'!$F$11:$F$307="x",ROW('Allocated & Spent'!$G$11:$G$307)),ROW(4:4))-10,1)),"",INDEX('Allocated & Spent'!$G$11:$G$307,SMALL(IF('Allocated & Spent'!$F$11:$F$307="x",ROW('Allocated & Spent'!$G$11:$G$307)),ROW(4:4))-10,1)))

Then the next cell to the right should say:

=IF(IF(ISERROR(INDEX('Allocated & Spent'!$G$11:$G$307,SMALL(IF('Allocated & Spent'!$F$11:$F$307="x",ROW('Allocated & Spent'!$G$11:$G$307)),ROW(5:5))-10,1)),"",INDEX('Allocated & Spent'!$G$11:$G$307,SMALL(IF('Allocated & Spent'!$F$11:$F$307="x",ROW('Allocated & Spent'!$G$11:$G$307)),ROW(5:5))-10,1))="","/////",IF(ISERROR(INDEX('Allocated & Spent'!$G$11:$G$307,SMALL(IF('Allocated & Spent'!$F$11:$F$307="x",ROW('Allocated & Spent'!$G$11:$G$307)),ROW(5:5))-10,1)),"",INDEX('Allocated & Spent'!$G$11:$G$307,SMALL(IF('Allocated & Spent'!$F$11:$F$307="x",ROW('Allocated & Spent'!$G$11:$G$307)),ROW(5:5))-10,1)))

etc., etc.

How can I fill across so those go up and I don't have to fill in those four numbers 350 times?!

Thanks so much.

It is 2007.

Yeah, can you tell I barely know what I'm doing?!

Awesome. Thanks so much!