Kryptronic Software Support Forum

I am attempting to configure zone based shipping using the Parcelforce and Royal Mail configuration files.

I want a set up where, for example:

a customer checks out with a total spend of < £10 then they would use a specific shipping product lets say royalmail-1 where the cost is specified as being £1.
If the spend is > £10 but less than £50 then they would use an other shipping product, say parcelforce-1 where the cost is specified as £5
and if above £50 then they would use parcelforce-1 but with free shipping.

My configuration has in ecom_shipzonerate a record:

royalmail-1 with subtotalmin 0, subtotalmax 10 cost 1
parcelforce-1 with subtotalmin 10, subtotalmax 50 cost 5
parcelforce-1 with subtotalmin 50, subtotalmax 10000 cost 0

Am I misunderstanding the use of the subtotalmin and subtotalmax fields in the table?

Is there any better way anyone would suggest I achieve the same thing?