The final bill and invoice shall be delivered to the consumer at the same time. The final bill, in addition to the requirements specified in § 20-425(g) of the Administrative Code, shall contain:
(a) the date of the final bill;
(b) the true legal identity, business address and license number of the dealer, as shown on the license issued by this Department;
(c) the name and address of the consumer;
(d) the complete signature of the dealer or his or her agent;
(e) a statement of total charges, which shall include the basis for the computation of labor charges including the total time spent on repair and the labor rate per hour; and
(f) a statement of whether a replacement part is used, rebuilt, or reconditioned.