Milk Cost and comparison

Bulk Barn powdered Soy milk cost per 250 ml cup = 6 cents 90 cal per cup
  cost $2.40 per Kg
Powdered Skim Milk 90 cal cost 25 cents per cup

4 Litre 2% milk

Natura soy milk 100 cal per 250 ml cost

Soybeans also cost $2.40 PER KG.
Soyabella Soymilk maker takes 100 gr of Soya beans = 420 cal.= 24 cents worth
makes 1.3 litres soymilk. = a bit more than 5 by 250 ml cups - therefore 24 cents /5= 5 cents, but takes moe time and some electricity.