Hi Everyone

I've just started a C++ programming class and I need to write a program to total up one day's worth of bank activity with a small percentage, but I don't know where to even start. Here's the problem summary:

The Silly Savings and Loan Company just opened up with a cash balance of $1000, and a plan to get rich. Their plan to make money is simple. They will charge no fee for checks, and a 3% fee for all deposits. You will write a program for them. They will run your program and enter deposits as positive numbers, and checks as negative numbers. All transactions will be recorded in the order they happen. When they run out of things to enter at the end of the day, they will enter a value of 0 to stop the program.

The program needs to add up both sets of numbers (deposits and checks) and figure out the amount of cash they should have at the end of the day. For every deposit, the 3% fee will be removed from the amount actually deposited, that amount will be added in to the profit they expect to make.

Once the data entry has been completed, the program will print out the total amount of checks written (as a positive number), the total amount of deposits received, the amount of cash they should have on hand, and the total profit earned that day.

Here are the transactions for their first day of operation:
Deposit 100.00
Check 500.00
Deposit 250.00
Deposit 25.00
Check 75.50
Deposit 27.50
Check 775.27

I started some code with the help of a friend, but I don't think it is correct. Can someone help me?
Here is was I had written before, thought I don't really understand what I have done.

#include <cstdlib>
#include <iostream>

using namespace std;

int main(int argc, char *argv[])
double 0.0;
double fee;
double checks;
double deposits;
double balance;
double balance = balance + checks+ deposists;
cout << "balance: ";
cin >> checks, depsits
return 0;

Please! Any help would be greatly appreciated