title: Javascript total Price calculation
body: <p>I need to create a very basic function that calculates the cost when a user clicks the button.</p>
  
  <p>Suppose there are three customers that want to travel; once they click on the button and select the number of people and a location then they should see their total cost for that location.</p>
  
  <p>For example, if they choose the second destination, then three persons will be £450, £500, and then £550 each, so the total should be £1500. </p>