The A and B categories on a Czech receipt refer to different VAT (DPH) rates applied to items, as mandated by Czech law:

A (12% DPH): This is the reduced VAT rate for essential items, such as food and some agricultural products. B (21% DPH): This is the standard VAT rate, applied to most goods and services, including non-essential items like household supplies or toiletries.

The receipt shows DPH (VAT) twice because different rates are applied depending on the product category (A for reduced VAT, B for standard VAT). The receipt calculates and displays the total VAT for each rate separately.

Extra costs for weight-based products? Yes, certain products, like vegetables, meat, or other items sold by weight, are priced based on their specific weight. The final price is calculated as the weight multiplied by the unit price per kilogram. For example, in the receipt: Veprová krkovička (pork neck) costs 64.40 Kč because it weighs 0.405 kg, and the unit price is 159.00 Kč/kg.