900g flour.
740g butter 300g icing sugar 900g flour 140g cornflour
flour
It is: 1/3 of 18kg = 6kg
I think you may need to do a little experimenting to find out for sure; if you add all the ingredients with one and a half cups of flour, then see how much more flour you need to add (if any) to acheive a smooth scone dough. I'm guessing it will be between 2 and 2 1/2 cups.
Eggs and flour
Flour & water
No, there is no flour in butter. Butter is made by churning or beating heavy cream until it solidifies. Margarine will have other ingredients in it, but none of those ingredients are flour, either.
Wheat
Water and flour.
flour and sugar
It depends on the type of flour or what is being cooked/baked.
Approximately 2 cups in half a pound of flour.