DAX help needed for some usecases

Hi All,

I am new to Power BI DAX and trying to achieve Danny's Diner usecase questions in DAX, however I am facing some issues with some DAX measures, could some look into the below PBIX in the drive with all questions and expected outputs once.

https://drive.google.com/file/d/1puuftwe5yOKhhSCPCqc77XCf3SkiyDXs/view?usp=sharing

Original Usecase:

https://www.linkedin.com/posts/deepak-rajak-935b411b_repost-databricks-pyspark-activity-7057193540363165696-VhRX/?utm_source=share&utm_medium=member_desktop