Discount collection

0 1 2 +3

0 1 2 +3

0 1 2 +3

0 1 2 +3

0 1 2 +3

0 1 2 +3

0 1 2 +3

0 1 2 +3

0 1 2 +3

0 1 2 +3

0 1 2 +3

0 1 2 +3

0 +1

0 +1