A factory recorded production over 10 days: 120, 135, 140, 150, 160, 170, 180, 190, 15, 20. Days 5 to 7 were recorded 15 units higher than actual each day. Days 9 and 10 were recorded with the last digit missing, so 15 was 150 and 20 was 200. Calculate the correct average daily production.
