The U.S. mint does, in fact, make a profit as most coinage and paper money cost far less than their face values. A few other coins, such as the penny, represent a loss. After restricting my search to the last three months and relying only on government or well-regarded financial sites I compiled the following information. The prices and compositions are for general circulation coins & bills and not collector kits, some of which are made of solid silver.
Penny Cost: 2.41 cents. Composition:Since 1982 penny's have been made of 97.5% Zinc and 2.5% Copper.
Nickel Cost: 11.18 cents. Composition: 25% Nickle and 75% Copper.
Dime Cost: 5.65 cents. Composition: 8.33% Nickle and 91.67% Copper
Quarter Cost: 11.14 cents Composition: 8.33% Nickle and 91.67% Copper