Help with Inventory Management

Well
I'v been doing 10 exercises so far, which were solvable more or less easily ..
but with at "Inventory Management" I have serious problems creating an empty Array of pairs

and think there a quite some things which are not explained in advance

these are: 
- creating an empty Array of Pairs
- how to sort
- can delete be used for both Pairs and Arrays or only for Arrays 
- how to create A `Vector` of Pairs not explicitely but by Variables

the exercise also seems a bit odd to me, as the results so far are not used in the ongoing process, which is not normal in a "real" program

You haven’t mentioned which track you are learning. I am guessing Julia.

yes it’s Julia

This thread is a dupe of Inventory Management, Return the entire content of the inventory