How much cafine is in a 6 oz cup of coffee?

How much cafine is in a 12 oz coke?

How much cafine is in one capsule of Xtreme Lean dist by Nature's Bounty Inc?

Colas generally run 30-100mg per 12oz.
Coffee 90-150,
Xtreme lean claims "The recommended dose of this product contains about as much caffeine as two cups of coffee." but they do not confirm the amount.