Have a client that base their pricing off of qty purchased.

So for example they have item A setup:

Qty Purchased 1-5 you receive price v
Qty Purchased 6-10 you receive price w
Qty Purchased 11-20 you receive price x
Qty Purchased 21-30 you receive price y
Qty Purchased 31-40 you receive price z

But they also have bulk pricing where you buy over a 100 for example and you get price a.

Obviously each item can have up to five different prices based on quantity purchased but any suggestions on how to handle the 6th re bulk?

Thanks in advance for any info posted.