First, let's calculate the total cost of buying individual issues for 6 months.
Since there are generally 6 issues in 6 months (one issue per month), the cost of purchasing them individually would be:
\[ 6 \text{ issues} \times 6.95 \text{ dollars/issue} = 41.70 \text{ dollars} \]
Now, we compare this to the cost of the 6-month digital subscription, which is $30.99.
Next, we'll calculate the amount saved by subscribing:
\[ \text{Savings} = \text{Cost of individual issues} - \text{Cost of digital subscription} \]
\[ \text{Savings} = 41.70 - 30.99 = 10.71 \]
Therefore, a reader saves $10.71 by subscribing to the digital magazine for 6 months.
So, the correct response is:
10.71