Even if he did use steroids, we don't know how many extra home runs, if any, they contributed.
Mary Wittenberg, the chief executive of the Road Runners, said that while she did not know how much extra her group would have to pay, she expected entry fees to run the marathon to increase proportionately.
It is too early to know how much extra money will be spent in north east Wales when the prison is working and HMP Berwyn is buying all those goods and services.
Me: "Do you know how much extra laundry I'm doing cleaning sweat-soaked sheets, tee-shirts and towels?
Once we know how many extra loaves we have to sell, we post a message to our Facebook and Twitter accounts announcing to our Bread Fans that we have extra loaves.
City officials won't know how much extra money they may need for the project until it's designed, but they expect $6.5 million can be raised through tax credits by next spring, according to a city report.
Know how many "extra" chains you'll need.
You will know how much extra your fuel cost you during a rise in prices.
"I was on a film once where someone was counting the heads of people in crowd scenes I'd drawn to know how many extras to hire," says McCallum.
Further insight on these issues is essential to know how the additional costs of testing extra-genital samples and managing more identified positive cases balances the costs avoided by reducing spread and morbidity due to extra-genital testing.
