A Red Lobster waitress says that two customers failed to leave even a penny as tip on a $45 meal but left their two cents about her skin color. Toni Christina Jenkins, 19, says when she returned to the table after dropping off the receipt, it read, "Tip . . . . . none. Total . . . N----r." "We are extremely distraught about this and doing a complete investigation," Red Lobster spokesman Mike Berstein told the Daily News.