At one point, certain U.S. Treasury bonds were callable. Consider the prices in the following three Treasury issues as of May 15, 2017: 05/15/2020 6.25 108.56250 108.62500 .31250 3.210 05/15/2020 7.30 109.09375 109.15625 .09375 4.030 05/15/2020 8.00 114.15625 114.34375 .46875 2.970 The bond in the middle is callable in February 2018. What is the implied value of the call feature? Assume a par value of $1,000. (Hint: Is there a way to combine the two noncallable issues to create an issue that has the same coupon as the callable bond?) (Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.)