rapidclick

Hi there, I hope I have posted in the right section. Im not sure how to configure Prestashop or which module to purchase or if it can be done This is the scenario im faced with we sell products by unit, x amount of units equals a pallet (below are the configurations) on average they could order 2 to 3 pallets. The first pallet costs $100 the second pallet $30, third pallet is $30 and so on. Im not sure how to configure Prestashop or which module to purchase. for example product 1 Size 450x450x40 poduct per M2 4.94 product per pallet 60 product 2 Size 400x400x40 product per M2 6.25 product per pallet 108 any thoughts would be great Cheers