using System;

using System.Text.RegularExpressions;

public class Program

{

    public static void Main()

    {

        string decimalGroup = @"(\d.)*\s*";

        string wordsGroup = @"([A-Za-z ])*?";

        var regexString = $@"A {wordsGroup}charge of {decimalGroup}at {decimalGroup}for {decimalGroup}already exists.\s+Replace with a {wordsGroup}charge of {decimalGroup}per {wordsGroup}at recomputed quantity\?";// exists.\nReplace";

        //of {decimalGroup} for {decimalGroup} already exists\.\nReplace with a {wordsGroup}charge of {decimalGroup} per at recomputed quantity\?$";

        Regex regex = new Regex(regexString);

        string[] inputs = {

@"A Minimum Charge charge of 1. at 879.00 for 495.00 already exists.

Replace with a Distance charge of 6.99 per at recomputed quantity?",

@"A Minimum Charge charge of 1. at 742.00 for 156.00 already exists.

Replace with a Distance charge of 1.38 per at recomputed quantity?",

@"A Haul Flat Rate charge of 1. at 0.01 for 0.01 already exists.

Replace with a Haul Flat Rate charge of 487.00 per at recomputed quantity?",

@"A Linehaul Flat Rate charge of 1. at 0.01 for 0.01 already exists.

Replace with a Linehaul Flat Rate charge of 1100.00 per at recomputed quantity?"

        };

        Console.WriteLine(regexString);

        foreach(string input in inputs)

        {

            Match match = regex.Match(input);

            Console.WriteLine(input);

            Console.WriteLine("\tMatch: "+match.Success);

        }

    }

}