As i understand from your tier pricing article ,you are picking the price that will fall between the Upper and lower limit.
But my problem is different , in my scenario i have a payout grid where slabs are same for every month and the problem is to provide the functionality to define this payout grid at different type of list.and the no.of list can be up to 10.
Ex: In April month Payout % is applicable for 4 no. of list. but in may month payout grid cab be define at 8 no. of list, so accordingly calculation will happen.