First of all, there are a few different enzymes that help to dictate a liver dysfunction. The liver is a place where it cleans the blood from toxic substances to the body, to make it simple. So, when there is a toxic substance present, the liver helps to move it from the blood and metabolize or dispose of it. In other words, liver enzymes will elevate everytime you have a glass of beer, wine, or mixed drink. Yes, even after only one, however, this is what is supposed to happen, that's what the liver does, among other things. Now the problem is when this is constant, it is constant stress on the liver and eventually damage can occur, e.g. cirrhosis. So they are just markers to let us know if there is anything going on. I don't know when the test was performed, but Mondays are a bad day to get a normal reading or level if there has been some partying over the weekend. Liver enzymes will remain elevated for a period of time after the "bender" is over. Because your levels were high, there should be a follow up with proper pre-test dieting, including not consuming any alcohol for a few days(and don't try yo make up for that by consuming heavily before your fast). This will help determine if this is more of a normal process or there is some other underlying pathology. The level that you listed is not that high, but still outside of normal range to warrant a re-test. To give you some comparison and to maybe ease your mind(I'm not saying there is nothing wrong because I don't know you, so take this for what it is worth), but I've seen college students tested on Monday morning after a weekend, of well, socializing, with liver enzyme levels from 150-350.
As far as the amount that you consume, most doctors will tell you the "optimal" health range is usually no more that two alcoholic drinks.
Good luck,
Prouzy