NumberFormatException when using FileReader and StringTokenizer - filereader

Question

The issue I am having is with the "Office" String. I get this: java.lang.NumberFormatException: For input string: "Office:" I feel like I need to do something else with the parseline down in the tokenizer section? Am I on the right track? I am basically trying to read from a file than I will calculate total sales and write to another file. This is the error I get even when I try to display my people.txt file to an output screen on my GUI. I just need a little advice to where to look to fix this. I have looked up many things but have not came close.
public class PersonReader {
public static void main(String args[]) throws IOException {
PersonReader reader = new PersonReader();
List<person> people = reader.readPeople("people.txt");
System.out.println(people);
}
public List<person> readPeople(String filename) throws IOException {
File f = new File(filename);
FileReader reader = new FileReader(f);
BufferedReader breader = new BufferedReader(reader);
List<person> people = new ArrayList<person>();
String line = breader.readLine();
while (line != null) {
person p = null;
try {
p = parseLine(line);
} catch (Exception e) {
e.printStackTrace();
}
if (p == null) {
System.out.println("This row is bad." + line);
} else {
people.add(p);
}
line = breader.readLine();
}
return people;
}
private static person parseLine(String line) {
int repID;
String firstName;
String lastName;
double books;
double paper;
double office;
String district;
String contact;
String next;
StringTokenizer st = new StringTokenizer(line, ", ");
repID = Integer.parseInt(st.nextToken().trim());
firstName = st.nextToken().trim();
lastName = st.nextToken().trim();
books = Double.parseDouble(st.nextToken().trim());
parseLine(line);
paper = Double.parseDouble(st.nextToken().trim());
parseLine(line);
office = Double.parseDouble(st.nextToken().trim());
parseLine(line);
district = st.nextToken().trim();
parseLine(line);
contact = st.nextToken().trim();
parseLine(line);
if (repID < 1) {
return null;
}
if (firstName.length() == 0) {
return null;
}
if (lastName.length() == 0) {
return null;
}
if (books < 1) {
return null;
}
if (paper < 1) {
return null;
}
if (office < 1) {
return null;
}
if (district.length() == 0) {
return null;
}
if (contact.length() == 0) {
return null;
}
person p = new person();
p.setRepID(repID);
p.setFirstName(firstName);
p.setLastName(lastName);
p.setBooks(books);
p.setPaper(paper);
p.setOffice(office);
p.setDistrict(district);
p.setContact(contact);
return p;
}
}