3 Web applications based on Java Spring boot and angular

We need to create 3 web applications based on the java spring boot (backend) and angular (frontend).

Please provide seperate pricing for each application. What I can say now, is that:

1st application will take 1 month to complete;
2st application can take 2 month to complete;
3st application around 3 month to complete;

so I need your pricing for the full stack development in java spring boot and angular:

1. For one month;
2. For 2 months;
3. For 3 month;

Best Wishes,