Any change to the specification requires a written change order from the customer. Work on the project will cease upon notification of a specification change until the customer issues an amended purchase order reflecting the engineering changes and new project cost.

All work requires a prepayment of one third of the value of the contract.

We bill on a progress payment basis for the remainder of the contract in four equal payments as follows:

• On customer acceptance of design concept
  
• On Completion of paper design
  
• On Completion of prototype assembly and testing by us
  
• On customer acceptance and design transfer

All work is billed at net ten days.

All work on the contracted project will cease if any invoice is overdue by more than fifteen days.

Invoices over due by more than 30 days will incur a 1.5% per month late fee.

Incidental expenses required to complete the project are billed to the customer.

If the customer does not have a formal specification and statement of work, the project will billed at an hourly rate of $95.00 per hour.

Travel to the customer's place of business is billed at $95.00 per hour plus travel expenses.