FIELD: physics, computer engineering.
SUBSTANCE: invention relates to systems and methods of conducting a transaction to acquire available goods or services using stored means associated with designation. The methods include: receiving, at a point of sale, identifiers of goods or services selected for acquisition, and designation; determining if the goods or services comprise available goods or services; calculating the sum required to acquire the available goods or services; determining if the stored means are enough to acquire the available goods or services; using the stored means to acquire the available goods or services; and using an additional funding source provided by the customer to acquire any goods or services which are not available goods or services. The system implements said methods.
EFFECT: high accuracy and reliability of a transaction, which includes an additional alternative source.
18 cl, 9 dwg
