Need help about Mturk!

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Friends! i am working with amazon mturk past one month and my balance is near to $78. i want to plan to request the payout! they are mentioning the check payment! my question is 'After the payment request, how many days it takes to reach to me?. 6 weeks is mentioning in Mturk website! Anybody working with mturk? how many days taking to reach the check? help me1