Their work has to be correct all the time, because mistakes can cost a lot of money.

Each mistake can cost a station many thousands of dollars.

The tragedy is that in war such mistakes cost lives.

How much had that single mistake cost the war effort?

"A single mistake could cost you your life," he says.

One mistake nearly cost him a shot at a major college basketball career.

The players did their jobs but the mistakes cost us.

But, as has so often been the case of late, mistakes cost them.

Statewide, he said, such mistakes could cost $1 million a year.

If he didn't find a group to carry out the job, the mistakes might cost him his own life.