Collection for discount

0 +1

0 +1

0

1

2 +3

0

1

2

3

4

5 +6

0

1

2 +3

0

1

2 +3

0 +1

0

1

2

3

4

5 +6

0 +1

0

1

2

3

4 +5

0 +1

0

1

2

3

4

5 +6

0

1

2

3 +4

0

1

2 +3