Explanation:
If Randy needs to buy a headset that costs $30.00 and notebooks that cost $3.00 each, we can calculate the total cost of the supplies as follows:
Let's assume that Randy needs n notebooks.
The total cost of the notebooks will be $3.00 * n.
The total cost of the headset and the notebooks will be $30.00 + $3.00 * n.
So the total cost of the supplies will be $30.00 + $3.00 * n, rounded to 2 decimal places.