Third quarter profit at Amazon.com Inc has more than quadrupled after the internet retailer reported strong sales in all categories.

Net income rose to US$80m, or $0.19 per share, up from $19m, or $0.05 per share during the same period a year earlier. 

Revenue climbed 41% to $3.26bn from $2.31bn in the year-ago quarter.

By region, North America sales were up 42% to $1.79bn. International sales, representing the company's UK, German, Japanese, French and Chinese sites, rose 40% to $1.47bn.

Although Amazon doesn't report its clothing and footwear sales separately, the quarter saw the company launch a shoes store and a baby store on its UK and German websites, selling tens of thousands of items from hundreds of leading brands.

Its Japanese website also opened an apparel and shoes store offering more than 30,000 items from more than 100 well-known brands.

Looking ahead to the fourth quarter, Amazon forecasts sales of between $5.1bn and $5.45bn.
 
For the fiscal year, revenues are expected to be between $14.26bn and $14.61bn, up from earlier guidance of $13.80bn to $14.30bn.