Carb cafe :

Month	Sales ('000s)
January	$ 37
February	$ 42
March	$ 39
April	$ 29
May	$ 49
June	$ 40
July	$ 39
August	$ 40
September	$ 43

What is the forecast for October using a 3-month weighted moving average approach? In order from the most to recent month, assign weights of 0.5, 0.2 and 0.1.