Shawna is planning a trip in which she drives from city A to city B to city C and then returns to city A. On a map that uses a scale where 1 in. represents 50 miles, she finds that city A is 1.8 in. from city B, which is 2.2 in. from city C, which is 0.9 in. from city A. Find the actual driving distance for this trip.