Илья

SELECT * FROM ( 
  -- SELECT MOST EXPENSIVE PRODUCT
  SELECT TOP(1) ProdID, Name 
  FROM Product 
  ORDER BY Price DESC 
) ExpensiveProd
JOIN (
  -- CALCULATE SALES BY PRODUCT IN DATE INTERVAL
  SELECT ProdID, SUM(Sum) ProdSales
  FROM Sales 
  WHERE Date BETWEEN '2019-07-01' AND '2019-07-31' GROUP BY ProdID
) ProdSales ON ProdSales.ProdID = ExpensiveProd.ProdID;

Как исправить код

s = [ int(i) for i in input().split()]

ordered_s = sorted(s)

c = Counter(s)

for x in c: ...