I have a website which works for my special set of users who views the products in my website and buys from the dealers. I want an easy way to display the price of the product by means of two dropdowns which contains version of the product and the city. If an user select the version and city the price have to be displayed in the page with good css and responsive. I need to know an easy way to frequently change the price and versions there are lots of products. This all must be done from the database.