What is the usual order in which financial statements are prepared from the adjusted trial balance? Why are they prepared in that order?

That sounds like a homework question. Please see the guidelines on posting homework:
Ask Me Help Desk - Announcements in Forum : Homework Help (https://www.askmehelpdesk.com/finance-accounting/announcement-font-color-ff0000-u-b-read-first-expectations-homework-help-board-b-u-font.html)

The textbook would present the statements in proper order, so that shouldn't be too hard to find. The "why" might be a bit trickier to find but give it a shot.

Perhaps this might help you understand...

Relationship Between Financial Statements (http://vitalbusinessinfo.blogspot.com/2009/10/relationship-between-financial.html)

Contribution Margin vs Gross Profit - can someone give me the differences and the shortcomings?

Jerry, please start a new thread for your post. We can't have all the questions tagged onto other threads all the time.

I also suspect that is a homework problem since it's asking about the shortcomings. If so, we are not here just to answer your homework questions for you -- you need to show us your attempts at doing it and then can guide your from there.

Perhaps this might help you understand....

Relationship Between Financial Statements (http://vitalbusinessinfo.blogspot.com/2009/10/relationship-between-financial.html)

I've moved my article to a different site if anyone is interested...

Relationship Between Financial Statements | eFinancialAnalysis (http://efinancialanalysis.com/relationship-between-financial-statements/)