The Secretary may pay to a person selected to receive assistance under this subchapter the amount of $400 (adjusted in accordance with section 7631 of this title) for each month of the person’s enrollment in a program of education or training covered by the agreement of the person entered into under section 7603 of this title. Payment of such benefits for any period shall be coordinated with any payment of benefits for the same period under chapter 106 of title 10.