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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def getDiscountedPrice(self):
 """Compute discounted price excl. VAT """

        price = self.getPrice()
        price = price and price or 0
        discount = self.bika_setup.getMemberDiscount()
        discount = discount and discount or 0
        return float(price) - (float(price) * float(discount)) / 100