This script will get the Packages, Categories, and items associated with a Bare Metal Server.
import SoftLayer
import pprint
from pprint import pprint as pp
client = SoftLayer.Client()
mask = "mask[id, fullyQualifiedDomainName, billingItem[id, item[id, description], category[name, id],children[id, item[id, description], category[name, id]]]]"
getDetails = client['SoftLayer_Hardware'].getObject(mask=mask,id=296740)
pp(getDetails)