How much does a loaf of white bread cost? How much does a load of whole grain cost?

Whatever it is you are trying to argue in your comment, it has nothing to do with the cost comparison I am making.

A loaf of white bread here costs a minimum of $1.99 (all prices CAD) and contains by my reckoning a bit over 400 grams of wheat. So nearly $5 per kilogram.

A kilogram of rolled oats can be easily found for about $3; white rice around $1.50 if you shop around; pasta from $1.33 to $2.22 depending (usually on the higher end of that); white flour $1 (in large bags).