Simple PHP Script Needed - $30 Max

I need a simple PHP Script written that will do the following: 1. The first time the script is run, it will ask user for the following: Enter Name Enter Goal Enter Goal Date The Script will write this data to a goal file, called [login to view URL] (or something like this). 2. The Script will then and each time it is run thereafter, ask for and store the following: Enter Current Weight The entry date will also be added to the log (date(today)) The Script will write this data to a data log file, called [login to view URL] (or something like this). 3. The Script will then and each time a new weight is added, compare this with the previous entered weight, as well as the goal weight. Open a [login to view URL] and [login to view URL] file and read in data. Calculate NewWeight - OldWeight = DifferenceWeight If DifferenceWeight < Old Weight, then echo "Good for you, you lost " DifferenceWeight "pounds." else echo "You owe $5 this week for not losing weight." I need to keep a runny total of the money owed. This should be very simple. I don't want this in MySQL. Please have comments in the script so I can edit it and I don't know too much about PHP. If you have a cleaner way of doing this, that is fine. The above is just my way of explaining it. I do not intend to pay more than $30 unless you can do something really super duper impressive. If you can show me the working script that would be great. I need you to install it on my server or be available to walk me thru installing it to make sure it works. Thanks!