You should arrange the cushions under the bottom in the numbers of 4, 6, 9, or 12 units.
For example, the total weight of the shipment is 1000kgs, the calculation for orange cushions is as follows.
1000kgs รท 56.7 kg/unit = 17.6 units , round up to 18units, arrange 3 rows x 6 units = 18 units around one turn and mounting them on the bottom of a pallet.