Help me in solving SQW29 problem

My issue

i want help

My code

SELECT 
    dps.product_type, 
    dps.product_id, 
    ms.revenue AS units_sold,  -- Assuming revenue can be treated as units sold
    ms.month
FROM 
    division_product_sales dps
LEFT JOIN 
    monthly_sales ms 
    ON dps.month = ms.month
WHERE 
    dps.product_type = 'High_Margin'
ORDER BY 
    ms.month, dps.product_type, dps.product_id;

Learning course: Database management systems
Problem Link: Project - JOIN and Filtering in Database management systems