Collection for discount

0 1 2 3 +4

0 1 2 +3

0 1 2 +3

0 +1

0 1 +2

0 1 2 +3

0 1 2 +3

0 1 2 3 +4

0 1 2 3 +4

0 +1

0 1 2 +3

0 1 2 +3

0 1 2 +3

0 1 2 +3