Chuck's Chops, an up$-$scale steak house, received an invoice for $800$ pounds of baking potatoes with a cost of $$\mathrm{.}85$ per pound. The terms were $21/2/10,$ n$/30.$ Chuck was unable to pay the bill in full within the discount period but was able to remit a partial payment of $$425\mathrm{.}00$ within the discount period. How much credit did Chuck receive for his payment?