E-commerce giant Amazon.com Inc (NASDAQ:AMZN) reported first-quarter financial results after the market close Tuesday. Here are the key highlights. What Happened: Amazon reported first-quarter net sales of $143.3 billion, up 13% year-over-year. The net sales total beat a Street consensus estimate of $142.5 billion, according to data from Benzinga Pro. The company reported North American sales of $86.3 billion, up 12% year-over-year. International segment sales were $31.9 billion, 10% higher year-over-year. The company's Amazon Web Services segment posted first-quarter sales of $25 billion, a 17% year-over-year increase. Amazon reported earnings per share of 98 cents in the first quarter, beating a Street consensus estimate of 82 cents per share. "It was a good start to the year across the business, and you can see that in both our customer experience improvements and financial results," Amazon CEO Andy Jassy said in a ...