An invoice received included the following information: merchandise price, $$1,600$; terms $\frac{1}{10},\frac{n}{e}om$;FOB shipping point with prepaid freight of $$324.$ Assuming that a credit for merchandise returned of $$300$ is granted prior to payment and that the invoice is paid within the discount period, what amount of cash should be paid by the buyer?

a$.$ $$300$

b$.$ $$1,611$

c$.$ $$1,905$

d$.$ $$1,600$