Where can I find Lump sugar in Grenchen?

Lump sugar can also be found in these cities:

Biberist Biel Bienne Brugg Burgdorf Delémont Derendingen Gerlafingen Hasle bei Burgdorf Ipsach Kirchberg Langendorf Lyss Moutier Münchenbuchsee Nidau Solothurn Tavannes Utzenstorf Zuchwil

You can also find this in Grenchen:

Baguette Yeast Dry Rye Breads Granola Bar Pies Cola Legumes Ketchup Chips Remoulade