For a limited time, this Perfect Portions Food Scale with Nutrition Calculator drops from $49.99 to $39.99 in your cart at BestBuy.com. Plus, shipping is free. This is the best price we could find for this food scale and nutrition calculator by $10 (see Amazon.com). It functions as a food scale that also tracks calories, fat, sodium and more for those foods. It includes 2 AA batteries and a food code book. Sales tax is charged in most states.