A perpetuity pays 1600 dollars on January 1 of 1980, 1982, 1984, ..., and pays $X$ dollars on January 1 of 1981, 1983, 1985, ... If the present value on January 1, 1975 is 26500 dollars, and the effective rate of interest is 6.8 percent, what is $X$?
Answer = dollars.