I was a vicodin addict , and I took 4-5 three times a day. I was fine on 30 mg of methadone, and then stailized at 40 mg. I was taking vic's through the night too. And it was hard taking methadone...
2500mg = 2.5 grams
mg and mL can not be compared unless you know the density.
20 grams = 20 000 milligrams
The answer is 60 although it could also be 8000