A three-step quantity ladder: the price falls at five, at ten and at twenty-five.

The same ladder with a steeper last step, for a buyer who orders by the pallet.

Its first step is at ten, so small orders all pay the same.

Flat priced with no break at all, the control the other four are read against.

Ladder and account price at once, so the narrower of the two wins.

A plan bought once and renewed on a schedule, so the order repeats itself.