To determine whether there is a shortage or surplus at the price of $100, we need to compare the quantity supplied and quantity demanded at that price level:
- Quantity supplied at $100: 4.8 million units
- Quantity demanded at $100: 5.2 million units
Now, we can calculate the difference:
- Quantity demanded - Quantity supplied = 5.2 million - 4.8 million = 0.4 million units
Since the quantity demanded (5.2 million) is greater than the quantity supplied (4.8 million), there is a shortage.
Therefore, at a price level of $100, there is a shortage of 0.4 million units.
The correct answer is: a shortage of 0.4 million units.