using System;
using System.Text.RegularExpressions;
public class Program
{
public static void Main()
var test = "ABC $300 DEF $600 GHI $120 JKF $980";
var rx = new Regex("[$][0-9]{0,2},?[0-9]{3}");
var matches = rx.Matches(test);
foreach (var match in matches)
Console.WriteLine(match);
}