Gas bill saved this month (Laughs)

(1)▷National 077 Yesco
(2)▷ Basic fee KRW 1,000
(3)▷ Replacement fee KRW 0
(4)▷ Usage fee KRW 8451
(5)▷ VAT KRW 145
(6)▷ Discount amount – KRW 8,000
(7)▷ an additional charge of 0 won
(8)①The total fee is 1,590 won.
(9)▷ Outstanding payment of KRW 0
(10)▷ Settlement amount KRW 0
(11)▷ Energy voucher KRW 0 ▷ cutting amount KRW 6
(12)②Total bill amount KRW 1,590