Question: Where is the headquarter of the Coop Extra?

Context paragraphs:
Khezhakeno: Khezhakeno is a village in the Phek District of Nagaland, India.  It is a historical village of the Nagas.  It is located in the region 25.30°N 94.12°E at an elevation of 1660 meters above sea level and shares its border with the Manipur state in the south.  The village is 48 km from the state capital Kohima via NEC "Viswema-Kidima-Zuketsa" road and is 23 km away from its Sub-divisional headquarter Pfutsero.  It is also one of the Administrative Circles headquarter of the state headed by an Extra Assistant Commissioner.

Megas XLR: Megas XLR is an American animated television series created by Jody Schaeffer and George Krstic for Cartoon Network.  The series revolves around two slackers: mechanic Coop and his best friend Jamie, who find a mecha robot from the future called Megas ("Mechanized Earth Guard Attack System") in a New Jersey junkyard.  Coop modifies Megas and replaces his head, the control center, with a classic muscle car, and names him XLR ("eXtra Large Robot").  Together with Megas's original pilot Kiva, they must defend Earth from the evil alien race called "the Glorft".  The series is a homage and parody of mecha anime.

Coop Norge: Coop Norge SA is a Norwegian cooperative.  It is owned by 117 local cooperatives with more than 1.3 million members.  The company has its headquarters in Oslo.

List of Megas XLR episodes: "Megas XLR" is an American animated action comedy television series created by Jody Schaeffer and George Krstic for Cartoon Network, which aired two seasons from May 1, 2004 to January 15, 2005, each consisting of 13 episodes.  The series revolves around two slackers, mechanic Coop (David DeLuise) and his best friend Jamie (Steven Blum), who find a mecha robot from the future called Megas ("Mechanized Earth Guard Attack System") in a New Jersey junkyard.  Coop modifies Megas and replaces his head, the control center, with a classic muscle car, and names him XLR ("eXtra Large Robot").  Together with Megas's original pilot Kiva (Wendee Lee), they must defend Earth from the evil alien race called "the Glorft".

Extra (Coop): Extra is a Norwegian discount supermarket chain of around 340 stores.  It is part of the Coop Norge cooperative and was until late 2015 named Coop Extra.  The chain markets itself as being low-cost while maintaining large stores with a wide selection of items.

Supporting paragraphs: Extra (Coop) Coop Norge
Answer: Oslo