At 1 gram/thermometer, that works out to 15,422,000 broken thermometers/year. That assumes, of course, that all the mercury from every broken thermometer winds up in landfill. Something doesn't seem quite right here...
What Ms. Collins meant to say was "by forcing the replacement of all mercury thermometers in homes and hospitals and doctor's offices with digital ones, at $10 per digital thermometer, the company that provides my campaign contributions stands to make $15,422,000 . (/sarcasm)