A seller prepaid their annual insurance premium of $$2,100$ on January $1$ and the closing is set for March $15,$ using the $12-$month$/30-$day method, if the buyer pays for the day of closing, what will the buyer owe the seller as prorated insurance?

$$431\mathrm{.}66$

$$437\mathrm{.}26$

$$1,668\mathrm{.}33$

$$1,680\mathrm{.}00$