The Tomac Swim Club arranged short$-$term financing of $$12,000\mathrm{.}00$ on July

$14$ with the Bank of Commerce and secured the loan with a demand note.

The club repaid the loan by payments of $$5100$ on September $6,$$$3700$ on

November $14,$ and the balance on December $30.$ Interest, calculated on the

daily balance and charged to the club's current account on the last day of

each month, was at $7\%$ per annum on July $14.$ The rate was changed to

$7\mathrm{.}25\%$ effective September $1$ and to $6\mathrm{.}5\%$ effective December $1.$ How much

interest was paid on the loan?