Three invoices for the amounts of $$34,000,$ $$27,000,$ and $$42,000$ were received on November $26,2014,$ December $26,2014,$ and January $18,2015,$ respectively. If the payment terms are $3/7,2/30,$ n$/60,$ calculate the amount that must be paid on January $25,2015$ to settle all three invoices.