notes: On a Weigh Bill Ticket, we can optionally process Haulage Sales and
Costs. The Income part is processed only IF a Billing Haulage Rate is
specified, otherwise not.
notes: The Haulage Costs are processed only IF a Haulage Rate per Ton is
listed, AND a Haulage Contractor is indicated.
notes: So we may process NO Haulage Costs, or only Costs, or only Income,
or both Costs and Income.