FARGO, N.D. - Nikki Calvin and Chris Rostad announce their engagement. Parents of the couple are Julie and Don Calvin of Savage and Janet and Mick Rostad of Fargo, N.D. Calvin is a 2005 Marshall High School graduate and graduated from Minnesota State University Moorhead in 2010 with a bachelor's degree in graphic design. She is a marketing assistant at Heritage Home/Prudential Premier Real Estate in Fargo. Rostad graduated in 2004 from Fargo South High School and from North Dakota State College of Science Wahpeton in 2006 with an associate's degree in building construction technology. He is employed by Roers Construction in Fargo. An Aug. 12, 2011, wedding is planned at First Lutheran Church followed by a reception at the Ramada Plaza and Suites in Fargo.