Checkpoint 2: due Sat, Mar 18, 23:59

Checkpoint 2 assignment will open up on Gradescope as soon as Checkpoint 1 closes.

To get a full score for Checkpoint 2, make sure that you correctly implemented the “Delete”, “Restore” and “Save” menu options and everything that they need.

• Upload the requested files shown above with the required functions added to them.
• Add the code and proper documentation (i.e. docstrings and comments) for all functions.
• You should already have the function stubs and the documentation for the rest of the functions that are not required to be implemented here (i.e. the menu options for “Update” and “Show average price”) - full functionality is not required for this checkpoint but you are welcome to include it as well.