You can also calculate the cost of driving from Cincinnati, OH to Detroit, MI based on current local fuel prices and an estimate of your car's best gas mileage. If you're meeting a friend, you might be interested in finding the city that is halfway between Cincinnati, OH and Detroit, MI.
Cocoa beans contain caffeine, so the higher the percentage of cocoa in a chocolate bar, the higher its caffeine content. Likewise for coffee: Ounce for ounce, the more diluted the coffee drink, the less caffeine.
The more nibs (or cocoa mass/cocoa liquor) used to make a piece of chocolate, the more caffeine it will contain. Cocoa nibs contain approximately 54% fat, much as peanuts contain peanut oil. The fat is called cocoa butter, and it contains no caffeine.