raleigh wrote:(1) and (2) together are not sufficient. Suppose she did make no other deposits for the rest of the month. She would have been charged a fee as you pointed out.

Consider the case where on the first day of the month she deposits $5000. Then there is no charge.

So (1) and (2) together is not sufficient to determine whether or not her account will be charged a fee. The answer is E.

yes.

more simply, we don't know whether sue has made any deposits during the month in question.
you can't assume that she has made $0 in deposits.

in fact, i think the amounts in question are meant to "clue you in" a bit: your conclusion of a negative $500 balance doesn't make a lot of sense, so that should get you thinking about other factors (such as deposits) that could legitimize the possibility of withdrawing $2000 in a month in which the initial balance was $1500.