Chelsea was supposed to pay Jacob $$4,800,6$ months ago, and $$1,500,5$ months from now. If she wants to reschedule these payments with two payments, one payment of $$3,100$ today and the balance $3$ months from now, calculate the balance amount.

Assume that the simple interest charged is $5\mathrm{.}25\%$ p$.$a$.$ and the agreed focal date is $3$ months from now.