不知道怎麼修改 visual c#
 

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace F9431131_6
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{

if (dateTimePicker1.Value >= dateTimePicker2.Value)
{
MessageBox.Show("(進入時間必須小於離開時間)");
return;
}


TimeSpan ts = dateTimePicker2.Value - dateTimePicker1.Value;


double hours = 0;
double days = 0;
double month = 0;
double week = 0;
double money = 0;
double money1 = 0;

hours = Math.Ceiling(ts.TotalHours);
days = Math.Floor(hours / 24);
hours = hours - (days * 24);
week = Math.Floor(days / 7);
days = days - week * 7;
month = Math.Floor(week / 4);
week = week - month * 4;



money = hours * 150 + days * 3240 + week * 20412 + month * 73484;
money1 = hours * 150 + days * 3240 + week * 20412 + month * 73484;

if (rest.Checked) //非假日
{
money *= 0.9;
money1 *= 0.9;
}
if (radioButton2.Checked) //4人房
{
money *= 4.0 / 3.0;
money1 *= 4.0 / 3.0;
}



if (hours >= 22)
{

hours = Math.Ceiling(ts.TotalHours);
days = Math.Floor(hours / 22);
hours = hours - days * 22;
days += 1;
money1 += money1;
}
if (days >= 7)
{
week = Math.Floor(days / 6);
days = days % 6 ;
days += 1;
month = Math.Floor(week / 3);
week = week % 3;
week += 1;
}
if (week >= 4)
{
month = Math.Floor(week / 3);
week = week % 3;
month += 1;
}


MessageBox.Show("消費金額：\n共住 " + month + "月 " + week +
"週 " + days + "天 " + hours + "時" +
"\n共 " + Math.Round(money) + "元" + "節" + money1 , "結帳明細");
}
}
}

要怎麼修改...
小時收費 < 一日收費 < 一週收費 < 一月收費??
急~~!!!拜託各位大大幫我!!!:on_72:

請問你到底要改什麼?

請將錯誤碼列出
 

因為不知道你的Form1.cs[設計]長的怎樣，所以請軤相關資料一併附上