The annual incomes of $1,000$ families range from $8200$ dollars to $98,000$ dollars.  In error, the largest income was entered on the computer as $980,000$ dollars.  The difference between the mean of the incorrect data and the mean of the actual data is
$\text{(A)}\ \text{882 dollars} \qquad \text{(B)}\ \text{980 dollars} \qquad \text{(C)}\ \text{1078 dollars} \qquad \text{(D)}\ \text{482,000 dollars} \qquad \text{(E)}\ \text{882,000 dollars}$
Let $S$ be the sum of all the incomes but the largest one.  For the actual data, the mean is $\frac{S+98000}{1000}$, and for the incorrect data the mean is $\frac{S+980000}{1000}$.  The difference is $882, or \rightarrow \boxed{\text{A}}$
This assumes that incomes of all the families are unique. Otherwise, more than one family could have $98000 as income and the above reasoning will not work.