On January 1, RST Corporation issued zero-coupon bonds that mature in four years with a total face value of $80,000. When the bonds were issued, the market interest rate was 5 percent. Determine the amount that RST received at issuance. Your answer should be rounded to the nearest full dollar (i.e., no cents). (Future Value of $1, Present Value of $1, Future Value Annuity of $1, Present Value Annuity of $1)