Invoices, insurance documents, and medical reports are all important pieces of information that can help you better understand tools and experiments. Invoices provide proof that money has been exchanged for goods or services. Insurance documents outline the terms of a policy agreement between an insurer and an insured party. Medical reports are used to document a patient’s condition as part of their healthcare record. With these documents, you have access to vital information about your tools and experiments which will help you make informed decisions moving forward.