I would like to hire an Engineer

I had a water leak and a bill that will cost me $931 for 200,000 gallons of water . The leak was fixed the same day it was found on December [login to view URL] previous month's bill had been $49. I have roughly figured that is that leak has started on Nov. 28 and leaked for a month that would be around 6666.66 gallons a day. My math problem that I'd solved is... the 1" pipe buried 3 foot underground was found to have a hole about 3/8 inch in diameter where the water was leaking out. The area where the leak was located should have been a swamp, but wasn't. About 20 grown bulls congregate in that area should have sunk up to their shoulder in mud and muck , but they didn't. Is it possible for 200,000 gallons of water to pass through a 1 inch pipe with a 3/8th hole in 30 days. I don't think that the leak had been leaking for 30 days that is just a guess. Hope someone can figure this out for me , before the city makes me pay this huge bill. One more thing the meter's needle is stationary at 4 1/2 gallons ..not 0 when no is being used. Thank you for any help MClem