I have a client that uses a number to identify his clients and then another number to indentify a job. The job is obviously a sub catagory of the client. It is possible that each job has several invoices. He does it this way so he can determine P & L of clients and/or of jobs. Now he wants to go a step further and know the profit of each invoice under each job under each client. What is the best way to go about this, if it is at all possible?