Delta, United, and American Airlines announced purchases of planes on July 18 (7/18), February 12 (2/12), and October 7 (10/7), respectively.

Delta			United			American
Date	Market Return	Company Return	Date	Market Return	Company Return	Date	Market Return	Company Return
7/12	.45	.69	2/8	.94	1.28	10/1	.65	.37
7/13	.00	.35	2/9	1.04	1.28	10/2	.55	.75
7/16	1.68	1.88	2/10	.55	.35	10/3	1.25	1.25
7/17	1.68	1.44	2/11	.75	3.93	10/6	.25	3.17
7/18	2.24	1.14	2/12	.45	.16	10/7	2.35	.42
7/19	.88	.67	2/15	1.25	3.20	10/8	.65	.65
7/20	.94	1.05	2/16	.65	.65	10/9	.45	.34
7/23	.76	.50	2/17	.45	.30	10/10	.45	.22
7/24	.25	.05	2/18	.45	.27	10/13	.00	.25

Given the above information, calculate the cumulative abnormal return (CAR) for these stocks as a group. All of the stocks have a beta of 1 and no other announcements are made. (A negative answer should be indicated by a minus sign. Leave no cells blank - be certain to enter "0" wherever required. Do not round intermediate calculations and round your answers to 2 decimal places, e.g., 32.16.)