Where can I find Baking soda in Untergeng?

Baking soda can also be found in these cities:

Alkoven Altenberg bei Linz Aschach an der Donau Eferding Engerwitzdorf Freistadt Gfehret Gramastetten Haslach an der Mühl Helfenberg Hellmonsödt Herzogsdorf Leonding Linz Mittertreffling Oberneukirchen Pasching Sankt Georgen an der Gusen Sankt Martin im Mühlkreis Sankt Peter am Wimberg Sankt Veit im Mühlkreis Sattledt Schenkenfelden Steyregg Walding

You can also find this in Untergeng:

Vanilla Sugar Jelly Popsicle Meat Coffee Drinks Rye Roll Canned Tomatoes Sunflower Oil Mustard Brandy