Whenever you use UID material on a course or project, or for your own projects, you must register the material and the amount of material used in the DOLF system. In projects or courses, the school often covers a certain amount of the costs, and anything beyond that is paid by the student.
The DOLF computer is located in the workshop, by the yellow lathe machine. Use that computer to DOLF the material that you take, unless you have received other instructions, such as writing it down on a specified list.