Collection for discount

0 +1

0 +1

0

1

2 +3

0

1 +2

0 +1

0 +1

0 +1

0 +1

0 +1

0

1

2

3

4

5 +6

0 +1

0 +1

0

1

2

3

4

5 +6

0 +1