C. 870. A car dealer sold 7 cars per day on the average in a certain period. If the day of the smallest number of cars sold is not counted, the average number of cars sold per day will be 8. If the day of the largest number of cars sold is not counted, the average will be 5. Finally, if both of these days are ignored them, the average will be 5.75 cars per day. What was the total number of cars sold by the dealer in the given period?
Deadline expired on 15 December 2006.