Product Sales Analysis II

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Example Testcases:

{"headers":{"Sales":["sale_id","product_id","year","quantity","price"],"Product":["product_id","product_name"]},"rows":{"Sales":[[1,100,2008,10,5000],[2,100,2009,12,5000],[7,200,2011,15,9000]],"Product":[[100,"Nokia"],[200,"Apple"],[300,"Samsung"]]}}