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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 getBasePrice(self,**kwargs):
        '''
        This method overrides the method of the base Event class by
        checking the pricingTier associated with this PrivateLessonEvent and getting
        the appropriate price for it.
        '''
        if not self.pricingTier:
            return None
        return self.pricingTier.getBasePrice(**kwargs) * max(self.numSlots,1)