bamazonCustomer.js is a program which helps a user (customer) buy goods.
1. View Products for Sale
If a user selects View Products for Sale, the app should list every available item: the item IDs, names, prices, and quantities.
2. View Low Inventory
If a user selects View Low Inventory, then it should list all items with an inventory count lower than five.
3. Add to Inventory
If a user selects Add to Inventory, your app should display a prompt that will let the user "add more" of any item currently in the store.
5. Add New Product
If a user selects Add New Product, it should allow the user to add a completely new product to the store.