Is There a Nitpickers'Anonymous?

I need a 12-step program. I was casually surfing the Growing Power site (the Chicago/Milwaukee urban farming operation that's gotten ink and a MacArthur Genius Award) and ran across this:

"At Growing Power it becomes worm food. We collect

over 20,000 lbs. of brewery waste from Lakefront Brewery every week

for compost or 1.4 million tons of waste annually."

20,000 lbs a week is 10 tons, or 520 tons a year according to old math. To be fair, I suspect some enthusiastic humanities student was writing the blurb (look at all those "o" sounds), and had a mind lapse when setting down the units of measure).