Present Value of Multiple Annuities.

A small business owner visits her bonk to ask $4$ a ban. The owner states that she can repay a lunn@ $400$ per month $4$ the not $3$ yrs$.$ & $32800$ fer monthe $4$ zyrs affer that. If the bank is chargig $8\mathrm{.}50\%$ APR, how much is the bank lending?

$=$$$1400$