Summing rows that have the same descriptive title

Hi all.
You guys have been so helpful to me in the past that I thought I might try again.
To be honest, I'm not even sure if this is possible.

Basically what I have is a list of HVAC equipment (that is generated from our software) with the type and quantity of filter or belt that belongs to that piece of equipment.

I already have a couple of macros for this sheet that delete extra rows and also sort it by the "Item Description"

Once it is to this point, I need to have a way to sum the quantity of a particular filter or belt.

It may be easier if I show you, so I have attached the document.

Like I said, I am not sure if this is possible, but if it is it would save me tons of time at work!