AIM: To Study the monthly sales of products sold on the website/internet as part of a real-world data science challenge.   click here 

Procedure : 

1. Importing Libraries
   
2. Combining all excel files
3. Data Audit
4. Clean up Data
5. Adding required columns (In this case we added sales column = quantity * price)

Conclusion :

1. Best month for sales / how much it was? -- December
2. Which city has highest number of sales? -- San Francisco
3. what time we should do advertisement to maximize sales? -- 11am and 7pm are peak time
4. what product are most often sold together?