Code for Supermarket billing system in scilab

Telecommunications billing is the group of processes of communications service providers that are responsible to collect consumption data, calculate charging and billing information, produce bills to customers, process their payments and manage debt collection.[1][2]
Telecommunications billing system is an enterprise application software designed to support the telecommunications billing processes.
Telecommunications billing is a significant component of any commercial communications service provider regardless specialization: telephone, mobile wireless communication, VoIP companies, mobile virtual network operators, internet service providers, transit traffic companies, cable and satellite TV companies could not operate without billing, because it creates an economic value of their business.