Discount collection

0 1 2 3 +4

0 1 2 3 +4

0 1 2 3 +4

0 1 2 3 +4

0 1 2 3 +4

0 1 2 3 +4

0 1 2 3 +4

0 1 2 3 +4

0 1 2 3 +4

0 1 2 3 +4

0 1 +2