Michael and Jake Lebhar were only teenagers when they began building their business, Lebbro Industries, from scratch. Now, the e-commerce and marketing company run by the two brothers sells multiple brands across several marketplaces, such as Walmart.com, Target.com and Amazon. With upwards of $10 million in annual sales, Lebbro is a success story and these are the young entrepreneurs’ tips for others looking to make it big with their online business....