Mrs. Marva Rucker, divorcee of 1534 N. 16th St., is shopping with food coupons under the Food Stamp Program. Her monthly income is $231--$156 of it from her Aid to Dependent Children and $75 from husband in support of their five small children. Monthly she is required to buy $30 worth of food coupons, and is given an additional $54 in free coupons, netting her total of $84 worth.