Final answer:
To find the total cost of the present, simply double the amount given by the aunt ($6) since it covered half the cost. The total cost is $12.
Step-by-step explanation:
If your aunt gave you $6 to cover half of the cost of a present, then to find out the total cost of the present, you multiply $6 by 2. The equation to determine the total cost of the present is:
Cost of present = $6 × 2
Performing the multiplication gives us:
Total Cost = $12
Therefore, the correct answer is C) $12, meaning the present cost twelve dollars in total.