Education tax benefits added up to more than $6.8 billion in 2008-2009.

Eight more people, she thought, adding them up in her mind.

Still, tiny savings each year could add up in the long run.

But these effects don't always add up in a straightforward way.

Heaven knew how much it added up to in all.

"I can add up the first $3 billion in 30 seconds without even thinking."

All these things make their own contribution and add up in a complex way.

These alone add up to $225 billion in tax relief over 10 years.

These would add up to around 75-90 minutes in total of story material.

Whether this added up in terms of cost per job was another matter.