0.0125uSCRT. A transaction on average is sized at 100,000 gas units, each transaction therefore costs
100,000 * 0.0125 *10^-6 = 0,00125 SCRT. The prices for these example transactions can always change if validators decide to run with different settings.
0but this is not done as to eliminate denial-of-service attacks. An attacker would have to pay a full block worth of gas every 6 seconds to keep up that attack this can become costly quite fast which disincentives the attacker.