Consider the following tree diagram: 
Which of the following nodes are interior nodes?
Definitions:
Ownership
The legal right or title to an asset or property, encompassing the control, use, and disposition of the asset.
Perpetual System
An inventory management system that records sales and purchases of goods instantly through computerized systems to maintain accurate inventory levels at all times.
Revenue Side
Refers to the income-generating aspects of a business, focusing on activities that bring revenue into the company.
Sales Discounts
Reductions in the selling price offered to customers as incentives to encourage prompt payment.
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