Collection for discount

0 +1

0 1 +2

0 +1

0 +1

0 +1

0 +1

0 +1

0 1 2 +3

0 +1

0 +1

0 +1

0 1 2 +3

0 1 2 3 4 5 +6

0 +1

0 +1

0 1 +2

0 1 +2