The document outlines the creation of a Java class named 'Invoice' that contains an array of 'InvoiceItem' objects. It specifies the need for methods to add, retrieve invoice items, and compute the total invoice amount by summing the totals of each 'InvoiceItem'.

1. For JAVA:
Invoice Class
Create a class called Invoice that has an array of type InvoiceItem. Add methods to set and get
the invoice item. Add a method to get the invoice total which loops through the array of
InvoiceItem(s) and sums them up using the InvoiceItem total method.