Missouri National Guard members in Iraq will benefit from a state settlement in a telephone overcharge case. AT&T has been charging more than 29,000 customers almost $4 a month that it should not have charged. Total overcharges: $285,000. The Attorney General and the Public Service Commission have been negotiating with AT&T for months. The phone company will pay the state $50,000 and will provide free calling cards to 1,500 Missouri families of National Guard members activated for duty in the Middle East. The calling cards provide about a half-hour of talking time to Iraq. The National Guard will decide who gets a calling card. Missouri is the only one to benefit troops with a settlement.