1 - 20 units: S$3421 - 50 units: S$31 More than 51 units: S$27
1 - 20 units: S$3821 - 50 units: S$34 More than 51 units: S$30
1 - 40 units: S$1741 - 100 units: S$15.5 More than 101 units: S$13.5
1 - 40 units: S$1541 - 100 units: S$14 More than 101 units: S$12
1 - 40 units: S$18.541 - 100 units: S$17 More than 101 units: S$15
1 - 40 units: S$2641 - 100 units: S$23.5 More than 101 units: S$20.5
1 - 40 units: S$7541 - 100 units: S$67.5 More than 101 units: S$60
1 - 40 units: S$7941 - 100 units: S$71 More than 101 units: S$63
