3¼ÂÆ® ±¸¸ÅÇϸé 1¼ÂÆ® ´õ ÁÖ°í 10% ÇÒÀÎÄíÆù±îÁö Àû¿ë °¡´ÉÇÕ´Ï´Ù.
1°³ ±¸¸Å½Ã = 7900¿ø
3°³ ±¸¸Å½Ã +1 = 23700¿ø - 2370¿ø = 21300¿ø