Variable sales price

Variable sales price

Dear,

I'm currently testing Zoho to replace our excel based order and quotation system.
Up to now everything what we need seems to work but 1 thing I can't grasp.
Hope someone of you knows how to tackle this...

The sales price of our products are depending on the order qty. for example:

from 0 to 5 pieces = 10€/piece
from 5 to 10 pieces = 9€/pieces
from 10 pieces = 8€/piece

I would really appreciate any guidance on how to approach this? 

Kind regards,

Noel