It was very good article. But question can I do like my client is based PA. He has multiple projects and each projects has several events for the same customer. Customer is on monthly billing. Each project generating invoice so, he would to have only one invoice for same customer for all multiple projects. He want to consolidate all projects with only invoice for the same customer. Any idea or suggestion I can follow to achieve this goal.
-Here is may be make more sense-

I am trying to get multiple Projects and Job Events from the same Client to show up on one invoice.

Example:
For Client ABC I have set up Project “A”. Under Project “A” I have Job Events 1,2, and 3.
Also under Client ABC I have set up Project “B”. Under Project “B” I have Job Events 1,2, and 3.

I want both Project “A”s Job Events and Project “B”s Job Events to print only one invoice.

Right now I have to print Project “A”s Events. Then print Project “B”s Events on a separate invoice.

Hope this makes sense. Thanks in advance.
Thanks in advance.
MM Ray