I'm looking for some direction. If someone can point me to resources or examples I would really appreciate.
Here is what I want to achieve.
We are some kind of a consultancy company. All we charge our customers are hours and expenses. So what I did wat creating some custom tables "Project", "Expenses" and "hours". I related those together. Project to account, and expenses and hours to project. So far so good. At some point we want to invoice our customer (at the end of a project or monthly/weekly).
Here's where I'm a bit stuck. What is the best approach to create this process and change the default invoice? Better, can I find an example of our way of work somewhere?
Regards, Mike