Nope - those are all bagged single ingredients I usually order online. Authentic Foods has most of them. The ivory teff is from Maskal. The arrowroot and tapioca might be called flour, starch, or powder - all the same thing. Potato starch and potato flour are 2 different things.

oh, so for example it's 100 grams white rice flour, 100 grams potato flour, and 100 grams tapioca starch, not 100 grams of a mix of the three? i guess that makes it add up to 2 kg

Yep, that's what I meant.

thanks! should have been obvious, but to me it wasn't