It’s over. Just hours ago, Amazon Prime Day #5 came to a close after selling more than 175 million items, surpassing results for the past Black Friday and Cyber Monday combined. Prime Day started in 2015 to celebrate the 20th anniversary of the site’s launch in July 1995. Amazon promised a one-day sales event for the site’s Prime subscribers that would be “one of the biggest deals extravaganzas in the world,” according to then vice president of…