[Not a question] Design and implement a C# class for items that can be sold via a point-of-sale system for a coffee shop.

Well ... take a pad and pencil, start thinking about the data and Types

You have an Item

So, you have an Item Name - String ?, Item Price - Double, Quantity Left - Integer .. (for example)

You'll need to think about wether these should be public, private (to your Item Class for instance), and wether you need to use get/set for example

Then think about what operations you'd have - 'Items' are sold arnt they - so maybe you'd have a method for 'selling' an item - that would take a quantity of how many units are being sold and throw some sort of error if the requested quantity is more than the quantity left

You already have a clue to one method you'll need - ToString()

So, I'd start with maybe

public Class Item
{
    public String  itemName {get; set;}
    public Decimal itemPrice {get; set;}
    public Int     itemQuantityLeft {get; set;}

    public override String ToString()
    {
        String readableItem = 
            String.Format(
                "Name {0} Price {1} Quantity Left {2}",
                itemName, itemPrice, itemQuantityLeft);
        return readableItem;
    }

}


but that's a 30sec starter - you need to implement a constructor, the method for Selling an Item, .... seems you have a lot of reading to do