Next, we update the bills again, setting the total bill to the price minus the discount plus the sales tax, which is read from the state table.
接下来，再次更新账单，将总账单设置为价格减去折扣和销售税，这从 state 表读取。
2
Handle foreign exchange deposits and loans, international remittance and settlement, foreign exchange Billdiscount, witness and guarantee.
办理外汇存款和贷款、国际汇兑结算、外汇票据贴现、外汇见证担保等业务。
3
The bill for a full 50-liter tank at 126.9 cents per liter comes to A$63.45 ($48.22). With the offered 20c a liter discount, the petrol bill would have instead come to A$53.45.