I am trying to configure discounts based on total order weight,  is there a way i can do this for example

if customer orders under 30kg it will be base price

if customer orders over 30kg but under 75kg discount will be applied (% or fixed) off total/line price

and again if customer orders over 75kg a different discount will be applied (% or fixed) off total/line price

and can it be applied via store front (ecommerce) and sales backend

We have been currently trying to use the pricelists but nothing shows available options on how to add discount based on the weight total of an order.