Amazon shares plunged more than 10% in extended trading Thursday after the company posted mixed fourth-quarter earnings, and boosted its full-year spending forecast to $200 billion. Here's how the company did, compared with estimates from analysts polled by LSEG:Earnings per share: $1.95 vs. $1.97 estimatedRevenue: $213.39 billion vs. $211.33 billion estimatedWall Street was also looking at other key revenue numbers:Amazon Web Services: $35.58 billion vs. $34.93 billion expected, according to St...