fruitPrices = {'apples':2.00, 'oranges': 1.50, 'pears': 1.75, 
              'limes':0.75,'strawberries':1.00}

def buyLotsOfFruit(orderList):
    """
        orderList: List of (fruit, numPounds) tuples
            
    Returns cost of order
    """ 
   #TODO: implement here
   return None