A prize structure of instant tickets defines award grades, prizes of respective award grades, and odds according to target customers in an accordance with a unit price. The prize structure is classified into high prize lottery in which the jackpot is high and low prize lottery where the jackpot is low. Usually, the high prize lottery has a big ticket size, a big sales amount, and a high printing cost, and fair distribution and security of high prize tickets must be managed in printing. Since the low prize lottery usually has a small ticket size and a small sales amount, a printing cost is relatively low. For the low prize lottery, printing, packaging, and delivery works are controlled for a guaranteed low end price structure (GLEPS).