10 units: S$6.2511 - 50 units: S$5.88 More than 51 units: S$5.61
1 - 10 units: S$4.611 - 50 units: S$4.33 More than 51 units: S$4.13
1 - 10 units: S$4.411 - 50 units: S$4.14 More than 51 units: S$3.95
1 - 10 units: S$14.1311 - 50 units: S$13.29 More than 51 units: S$12.68
