After critically reading the article "Supermarkets in the US are facing a price war" published on the website of Expansin Magazine on June 8, 2018, prepare a analysis and make a comment on the article covering the following points:

What is the importance of determining the price of products and services for companies in any sector? What role do prices play in the competitiveness of companies?

Link article: https://expansion.mx/empresas/2018/06/07/los-supermercados-de-eu-se-enfrentan-en-una-guerra-de-precios