(NASDAQ:AMZN) has reported mixed results in its Q4 and 2012 report. For the quarter, the company's net sales grew 22% on a year-over-year basis to $21.3 billion; however, net profit declined over that same time frame. It dropped 45% to $97 million, or $0.21 per diluted share.

Although analysts had been expecting substantially higher numbers in both metrics -- $22.3 billion in the top line and $0.28 in EPS -- the retailer's stock nevertheless jumped in after-hours trading. It was up by more than $20, or 8%, to $280.63.

For the full year, net sales grew 27% to $61.1 billion, while the bottom line came in at loss of $39 million ($0.09 diluted EPS). Those figures for 2011 were $48.1 billion and a profit of $631 million ($1.37 diluted EPS).

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