Where can I find Baking soda in Appenzell Meistersrüte?

Baking soda can also be found in these cities:

Abtwil SG Altach Altstätten Appenzell Arbon Au Bischofszell Degersheim Diepoldsau Feldkirch Flawil Fußach Goldach Gossau Göfis Götzis Hard Heiden Herisau Hohenems Koblach Laterns Lustenau Mäder Oberriet Rheineck Rorschach Sankt Margrethen Schnifis St. Gallen Sulz Teufen Thal Weiler Widnau Wittenbach Übersaxen

You can also find this in Appenzell Meistersrüte:

Wheat Toast Lump Sugar Fish Sticks Roll Cheesecake Help Sunflower Seed Bread Power Bar Salads Iced Tea Coffee