文件中例如1饭钱1000 2房租2000 这样的数据怎么把后面的花费相加输出？

文件内容：

1饭钱1000
2房租2000
3请客500
4修车700
5买礼物600
6在58同城会员注册199
10熬夜写代码50
12朋友结婚礼钱1000
23American电影160
191路上913公交丢钱200

package com.briup.exam;

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;

public class Test {
public static void main(String[] args) throws IOException {

Record rd = new Record();
BufferedReader br = new BufferedReader(new FileReader("4.txt"));

String s;
while ((s = br.readLine()) != null) {
char[] arr = s.toCharArray();
int len = arr.length;
int startInfo = loopNumber(arr, rd);
int endInfo= loopMoney(arr, len, rd);
loopWhere(arr, startInfo, endInfo, rd);
System.out.println(rd.toString());
}
rd.print();
br.close();
}

//循环取出【消费序列号】字段数据的方法
public static int loopNumber(char[] arr,Record rd){
String number = "";
int index = 0;
while(Character.isDigit(arr[index])){
number += arr[index];
index++;
}
rd.setPayNumber(Integer.parseInt(number));
number = "";
return index;
}

//循环取出【消费去向】字段数据的方法
public static void loopWhere(char[] arr,int startInfo,int endInfo,Record rd){
String where = "";
for(int i=startInfo;i<endInfo;i++){
where += arr[i];
}
rd.setPayWhere(where);
where = "";
}

//循环取出【消费金额】字段数据的方法
public static int loopMoney(char[] arr,int len,Record rd){
String money = "";
int index = len;
while(Character.isDigit(arr[index-1])){
money = arr[index-1] + money;
index--;
}
rd.setPayMoney(Integer.parseInt(money));
rd.add(Integer.parseInt(money));
//		System.out.println(rd.add(Integer.parseInt(money)));
money = "";
return index;
}

}

class Record {
private int payNumber;
private String payWhere;
private int payMoney;
private int sum;

public Record() {
}

public Record(int payNumber, String payWhere, int payMoney) {
this.payMoney = payMoney;
this.payNumber = payNumber;
this.payWhere = payWhere;
}

public int getPayNumber() {
return payNumber;
}

public void setPayNumber(int payNumber) {
this.payNumber = payNumber;
}

public String getPayWhere() {
return payWhere;
}

public void setPayWhere(String payWhere) {
this.payWhere = payWhere;
}

public int getPayMoney() {
return payMoney;
}

public void setPayMoney(int payMoney) {
this.payMoney = payMoney;
}

public int add(int payMoney) {
sum += payMoney;
return sum;
}

public void print() {
System.out.println("本次消费总额: " + sum);
}

@Override
public String toString() {
return payNumber + "." + payWhere + "  " + payMoney;
}

}