The majority of companies collaborate with other companies, consumers, suppliers, and other stakeholder networks. In developed economies, more than half of all transactions are between companies. About half of a company's costs come from purchasing products and services. Most e-commerce is between companies. Marketing to corporations is the act of selling goods or services to companies that then resell those products or use them for operational purposes. The number of customers is not limited to companies - educational institutions, government agencies, and non-profit organizations can also buy goods or services.