Construct the DuPont system of analysis using the following financial data for Key Wahl Industries and determine which areas of the firm need further analysis.
Key Financial Data 
Definitions:
Net Realizable Value
The estimated selling price of goods, minus the costs of their sale or completion, used in determining the value of inventory on hand.
LIFO
An inventory valuation method standing for Last-In, First-Out, where the most recently acquired items are assumed to be sold or used first.
FIFO
FIFO (First In, First Out) is an inventory valuation method where the oldest inventory items are recorded as sold first.
Fair Value
The estimated market value of an asset or liability, based on current market prices.
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