R&R Savings Bank finds that its basic transaction account, which requires a $$1000$ minimum balance, costs this savings bank an average of $$3\mathrm{.}25$ per month in servicing costs $($including labor and computer time$)$ and $$1\mathrm{.}25$ per month in overhead expenses. The savings bank also tries to build in a $$0\mathrm{.}50$ per month profit margin on these accounts.

What monthly fee should the bank charge each customer?

$$3\mathrm{.}25$

$$1\mathrm{.}25$

$$0\mathrm{.}50$

$$5\mathrm{.}00$