I need to create a function to do web scraping and get the products from some online stores of supermarkets. Then display the information on a page so that users can compare the prices. The websites of the supermarkets are: plazavea.com.pe, metro.pe, tottus.com.pe, wong.pe, almacen.metro.pe and vivanda.com.pe. I want to talk about the cost and development times.