How many payment periods does a payment period cover with a periodic interest rate of 6%, a periodic payment of 153.75 currency units and a present cash value of 2.600 currency units.
期間利率が 6% で定期支払額が 153.75 貨幣単位、現在価値が 2,600 貨幣単位である場合の支払い回数を求めます。