NEED Urgent help

Hello Team,

I'm currently working on creating a report on customer churn. Here are some points I need your help in: 

1. I need to calculate the total number of customers I had in the previous year, considering only those customers who had non-zero revenue and volume.

2. For calculating churn rate, I want to identify customers who generated revenue in the previous year but didn't generate any revenue in the current year. As an example, if we take 2023 as the current year and 2022 as the previous year, a customer with ID 74 would be considered a churned customer.

3. I also need to figure out how to present the year-on-year calculation for customer churn.

Here is the link to sample dashboard 

Please help me out I am really stuck here.