We are using zen cart version 1.3.9 and are needing immediate assistance to program our tax and shipping modules. The tax module needs to calculate local and state taxes nation wide in the United States. The shipping module needs to caluclate our flat shipping rates by regions/zones, and product weight/or quantities. We have downloaded tax cloud for our tax module, but are open to other immediate programming solutions. We would like to have this accomplished within 12 hours of this posting.