For commercials aired during a sporting event, advertisers paid an average of $5 million to air a 30-sec commercial. Even at this rate, some commercials were longer than 30 sec. A total of 56 commercials ran for either 30 sec or 1 min. The total 1 running time was 35 min. How many of each length commercial aired during the sporting event? There were 30-sec commercials and 1-min commercials aired. (Type whole numbers.)