Total price and number of units—cost per unit. Compare two products by unit price.
Each product’s unit price = price ÷ units. The percent compares the two unit prices relative to the lower one: |A−B| ÷ min(A,B) × 100. If product B fields are empty, only A’s unit price is shown.
This calculator uses plain decimal numbers. If a result looks wrong, check whether you used a comma instead of a dot (or vice versa) where the field expects one.