Unidad Price Comparar

Compare shop offers by total price and package size. Unit prices are compared only inside one dimension: mass per kg, volume per litre, or count per item. Grams, pounds, and ounces convert to kilograms; millilitres convert to litres. Mass is never compared with volume; no density is assumed.

Price must be a finite number ≥ 0; size must be a finite number greater than 0. Blank price is not zero. Invalid rows are marked and left out of the comparison. The lowest unit price in a group is marked best; a single offer in a group has no winner; equal unit prices tie.

Example: 2.00 for 500 g is 4.00/kg; 3.00 for 1 kg is 3.00/kg, so the 1 kg offer is cheaper. 0.00 for 1 kg is 0/kg. 1000 ml and 1 l at the same price tie. 1 l and 1 kg have no shared winner.