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some of the numbers in a list = a total

• To: mathgroup at smc.vnet.net
• Subject: [mg34992] some of the numbers in a list = a total
• From: bugman <bugman at optonline.net>
• Date: Tue, 18 Jun 2002 02:48:34 -0400 (EDT)
• Sender: owner-wri-mathgroup at wolfram.com

Hi
I've inherited a spreadsheet that has the number of hours billed for 
certain enchantments.  Some of the enchantments are for mainframe 
projects and some for desktop.  My predecessor (not available) came up 
with a total of the mainframe projects.  I don't know how he arrived at 
that exact number.  So what I have is a list of 100 or so numbers.  A 
certain combination of those numbers equals my totals.  I am a complete 
newbie to Mathematica. Tried it in Excel but ran out of Stack space.  Is 
this the right tool?  If so, what function/equation would I use to do 
this?  did I mention I'm new at this?

Thanks