/* Written by Jen Chen
Date: updated in Summer 05
*/

import java.io.*;
import java.util.*;

public class File_Writer_tabDelimiter {
  public static void main(String[] args) throws IOException{
	BufferedReader buf = new BufferedReader(new InputStreamReader(System.in));
	  File output = new File("output.txt");  //create a new file for output.
	  output.createNewFile();  //create a new file if necessary.
	BufferedWriter out = new BufferedWriter(new FileWriter(output));

	String fname = "Details.csv";
	  fname = fname.trim();

	BufferedReader in = null;
	try{
	  	in = new BufferedReader(new FileReader(fname));
	}
	catch(Exception e){
	  System.out.println("Unable to open the specified file!");
	  System.out.println(e);
	  System.exit(1);
	}
	StringTokenizer st;
	int qty = 0;
	double price_unit = 0., sum = 0.;

	try{
	  in = new BufferedReader(new FileReader(fname));
	  String  line = in.readLine();

	String st3 = "---------------------------------------------------------------------";
	String st4 = "Description\t\t\t Unit price\tQuantity\tTotal";  //Print our OWN column HEADER!!! (NOT from the .csv file)";

	  out.write(st3 + "\n"); //write the column headers to the output file.
	  out.write(st4 + "\n"); //write the column headers to the output file.
	  out.write(st3 + "\n"); //write the column headers to the output file.

	  line = in.readLine(); //read into the next record; ie: we skip the column header.
	  while(line != null){
	    st = new StringTokenizer(line,",");

	    while(st.hasMoreTokens()){  // linenum > 1 means to skip the header of
	      String st2 = (String) st.nextToken();    //the Details.csv file. (it is String, thus it can't be PARSE!)
	      st2 = st2.trim();

	      st2 = st.nextToken();  //read into the next token; ie: the 2nd field of the current record.
	        out.write(st2 + "\t");  //write the product's name to the output file.

	      st2 = st.nextToken().trim();  //read into the next token; ie: the 3rd field of the current record.
	        price_unit = Double.parseDouble(st2);
	        out.write("$" + st2 + "\t\t");  //write the per unit price to the output file.

	      st2 = st.nextToken().trim();  //read into the next token; ie: the 4th field of the current record.
	        qty = Integer.parseInt(st2);
	        sum = price_unit*qty;
	        sum = (double) Math.round(sum*100)/100;//round to 2 decimals.
	        out.write(qty + "\t$" + sum + "\n");  //write the quantity & the sum to the output file.
	     	st.nextToken(); //Eventhough we don't want to write the last element of the string returns from the StringTokenizer class,
	     					//we still HAVE to READ into the REMAINING tokens so that we could get out of this WHILE-loop.
	     					//Otherwise we'll get an error message.
	     } //end of the inner WHILE-loop

	    line = in.readLine();
	    }  //end of the OUTER WHILE-loop.
	}
	catch(Exception e){
	  System.out.println(e);
	  System.exit(0);
	  }
	  out.close();
  }
}