Harbor Hardware practice kit (course 4, lesson 1)

Harbor Hardware is a made-up shop that still types its orders into an old program called Ledger 98.

orders.csv   The 5 orders to type in.
ledger.py    Ledger 98 itself: a small window with three boxes, a Save order button and a list
             of the orders saved in that window. Every saved order goes into ledger.csv.
check.py     Compares ledger.csv with orders.csv and says PASS, or what is missing or saved twice.

You don't run anything yourself. In the Code tab, ask Claude to start Ledger 98 and to run
check.py. Nothing in this kit connects to the internet.

To start again from nothing, ask Claude to delete ledger.csv.
