Completed DCM 9: Service 4 of 4 filter change, AC, bill out $667.50 - - AC; (8) 20x20x2, (4) 20x25x2, (3) 16x25x2, (1) 20x25x1, (1) 16x25x1, (1) 16x20x1, (1) 10x45x1 replaced, (2) Washable filters cleaned. (1) AX46, (1) AX54, (1) A39, (1) A50 checked