End user data entry for calculation

[LH22]

Hello, I am trying to find a way to build report like this:

I am connected to sql database from where I have generated list of products. I need the end user to fill the sale quantity for each product for each month so I can calculate the company's costs and profit. 

The problem that I can't solve is that the product list from database can change so I can't make a static list for end user to fill. 

I know a little about what-if parameters but I don't see this as a way because of the product list dynamic change and big amount of products. 

I have heard about power apps which would be perfect for filling the sale quantity. But I am not able to find a way to get these data from data app back to power bi where it could be used for calculation.

How could I make this work?

Thank you for advice.

[LH22]

@amitchandak Could you please give me more step by step advice? I did read the article where the power app is connected to google sheet. I am lost on how to get the data power bi -> google sheet -> power app -> google sheet -> power bi? Also I don't understand how to use the power app outcome in power query. I need the data from end user to be used in power bi measures. Thank you

[amitchandak]

@LH22 , Please explore power app for this case

https://community.powerbi.com/t5/Power-Platform-Integrations/Power-Apps-Power-BI-Better-together-Wri...

https://www.youtube.com/watch?v=LxuRzj0X348

On refresh data will come back to power bi