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From: Nathan356 on 19 May 2010 18:54
All,
I have a multi-level bill of material and I want to create a
function that will sum it properly without having to sum up each
level
manually. Here is an example:

Level Item Quantity Cost
1 Chair 1 $39
2 Seat 1 $15
3 Cushion 1 $10
3 Base 1 $5
2 Leg 4 $1
2 Back 1 $20
3 Leather 1 $12
3 Wood 1 $8

In my example, I have a chair. The chair is composed of a seat ($15),
four legs ($1 each), and a back ($20) for a total of $39. However, the
seat and back are composed of subcomponents. So, my input values
should look like this:

Level Item Quantity Cost
1 Chair 1
2 Seat 1
3 Cushion 1 $10
3 Base 1 $5
2 Leg 4 $1
2 Back 1
3 Leather 1 $12
3 Wood 1 $8

And I want excel to figure out the blanks for me using a formula. Can
this be done? Essentially I'm looking for a formula that will sum just
the level below it, until it runs into an equal level, and then it
stops. So, in the case of the seat, it should know to sum the cushion
and the base, but not the leather and the wood. Thanks for the help!
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