Traceback (most recent call last):
  File "/home/konkan/development/showcase/errexplain/examples/pyapp/report.py", line 12, in <module>
    main()
  File "/home/konkan/development/showcase/errexplain/examples/pyapp/report.py", line 8, in main
    print("Total:", total_cost(ITEMS, prices))
                    ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/konkan/development/showcase/errexplain/examples/pyapp/inventory.py", line 12, in total_cost
    total += prices[item["sku"]] * item["qty"]
             ~~~~~~^^^^^^^^^^^^^
KeyError: 'C300'
