using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace Debugging

$\{$

public class DebugFour$4$

$\{$

static void Main$()$

$\{$

$//$ Declare and initialize variables and constants

double sales $=0,$ commission $=0$; $//$ Variables for storing sales and commission amounts

string inputString; $//$ Variable for storing user input as a string

const int LOWSALES $=1000$; $//$ Lower sales threshold

const int MEDSALES $=5000$; $//$ Medium sales threshold

const int HIGHSALES $=10000$; $//$ Higher sales threshold

const double LOWPCT $=0\mathrm{.}05$; $//5\%$ commission rate

const double MEDPCT $=0\mathrm{.}07$; $//7\%$ commission rate

const int BONUS$1=1000$; $//$ $$1,000$ bonus

const int BONUS$2=1500$; $//$ $$1,500$ bonus

$//$ Prompt user for sales amount

Console.WriteLine$("$What was the sales amount? $")$;

inputString $=$ Console.ReadLine$()$;

sales $=$ Convert.ToDouble$($inputString$)$; $//$ Convert string input to a double

$//$ Evaluate sales amount and calculate commission

if $($sales $<=$ LOWSALES$)$

commission $=$ sales $*$ LOWPCT; $//5\%$ on sales up to $$1,000$

else if $($sales $>$ LOWSALES && sales $<=$ MEDSALES$)$

commission $=($LOWSALES $*$ LOWPCT$)+($sales $-$ LOWSALES$)*$ MEDPCT; $//5\%$ on first $$1,000$ and $7\%$ on amount over $$1,000$ up to $$5,000$

else if $($sales $>$ MEDSALES && sales $<=$ HIGHSALES$)$

commission $=($LOWSALES $*$ LOWPCT$)+($MEDSALES $-$ LOWSALES$)*$ MEDPCT $+$ BONUS$1$; $//$ Additional $$1,000$ bonus for sales up to $$10,000$

else if $($sales $>$ HIGHSALES$)$

commission $=($LOWSALES $*$ LOWPCT$)+($MEDSALES $-$ LOWSALES$)*$ MEDPCT $+$ BONUS$1+$ BONUS$2$; $//$ Additional $$1,500$ bonus for sales over $$10,000$

Console.WriteLine$("$Sales: $\{0\}$

Commission: $\{1\}",$ sales.ToString$("$C$"),$ commission.ToString$("$C$"))$;

Console.ReadKey$()$;

$\}$

$\}$

$\}$

The file DebugFour$4.$cs has syntax and logical errors. Determine the problem$(,$ and fix the program code.