The answer to the given question above would be $47,859,000,000 or $48 billion. Given that the average adult produces $110,000 of output per year, the amount of output that is lost annually as a result of adult deaths from secondhand smoke is $48 billion.
600,000 total deaths
165,000 children
435,000 adults
435,00 times $110,00 output per year = $47,859,000,000
Hope this helps.