Hungary's $100-million loan is designed to help the county accumulate more foreign exchange by producing more farm goods for export. The loan must be repaid in 15 years, including three years of grace during which only interest will be collected. The interest is at a variable rate, beginning with 8.23% a year. The $81-million loan to Nigeria, which is repayable in 20 years, is to help that nation improve its livestock productions. The variable-rate loan, which begins at 8.23% a year, also has a five-year grace period during which only interest will be collected.