SumIF Using Named Ranges

I want a sumIF function (based on three criteria) to fill the values of cells in a column so long as there are values in the cells in the column before that one. I was working with trying a loop, but have been shown a faster way is using the With function.

There are four named ranges that all exist on a separate sheet in the file: Crude, Location, Year and Volume. Based on the first three columns of the file I wish to have an output for the sum of volume based on crude, location and year.

Right now, my output simply returns the total sum of the "volume" range in each cell in the output column.

For example, if total sum of values in the volume column is 100 then my output column currently looks like:

100
100
100
100
etc...

Here is my code including the named ranges:

[Code] ......