To find the unit price of the cat food, you need to divide the total cost by the total weight in kilograms.
The total cost is $5.84, and the weight is 8 kilograms.
So, the unit price can be calculated as follows:
\[ \text{Unit price} = \frac{\text{Total cost}}{\text{Weight}} = \frac{5.84}{8} \]
Now, performing the division:
\[ \frac{5.84}{8} = 0.73 \]
Therefore, the unit price of the cat food is $0.73 per kilogram.