Final answer:
The unit price of the output for a purely competitive firm is calculated by dividing the total revenue by the quantity sold, which in this case is $48 divided by 6 units, resulting in a unit price of $8.
Step-by-step explanation:
To calculate the unit price of the output for a purely competitive firm, we divide the total revenue by the quantity of output sold. In the scenario provided, the firm's total revenue from selling 6 units of output is $48. To find the price per unit, we simply divide $48 by the 6 units sold.
Unit Price = Total Revenue / Quantity
Unit Price = $48 / 6 units
Unit Price = $8 per unit
Therefore, the unit price of the output is $8, which corresponds to option c).