Levi Johnston Child Support $1,750 a Month

Levi Johnston has been ordered to make interim child support payments of $1,750 per month to the mother of his child, Bristol Palin.

The figure is 20 percent of the adjusted annual income of the 19-year-old Johnson as set out in Alaska statute.

Bristol Palin, also 19, is the oldest daughter of former Alaska Gov. and GOP vice presidential nominee Sarah Palin.

The son of Bristol Palin and Johnston, Tripp, was born in December 2008.

The payments for Johnston, based on estimated income of $105,000 are retroactive to May 2009. The payments are slightly lower for January through April 2009 because of Johnston's lower income.

Palmer Superior Court Judge Judge Kari C. Kristiansen set a trial date in the matter for Sept. 23.