Equestrian Roads accepted a customer's $$50,000$ zero$-$interest$-$bearing six$-$month note in a sales transaction. The product normally sells for $$46,000($cash price$).$ If the sale was made on June $30,$ how much interest revenue from this transaction would be reported for the year ending December $31?$

a$.$ $$0$

b$.$ $$2,000$

c$.$ $$4,000$

d$.$ $$6,000$