Spending amount (A) | Number of DBS$ used (B) | Converted at DBS$1 = HK$1.43 to set off the spending amount (C) (C = B × 1.43) | Amount payable after set off (D) (D = A – C) | |
Example 1 | HK$143 | DBS$100 | HK$143 | HK$0 |
Example 2 | HK$143 | DBS$53 | HK$75.79 | HK$67.21 |
Example 3 | HK$83.90 | DBS$58 | HK$82.94 | HK$0.96 |