Contract

Invoice are created from Contracts. When an Invoice is generated, the status of a Contract is updated (just like on other Niagara components there's, 'Status', 'Last Ok Time' and 'Last Failure Time' Properties. A Contract also contains some of the following Properties...

Currency: the currency used in calculation of the Invoice.
Include Tax: After all of costs and additions have been added, a tax rate percentage can be applied to the total. If this Property is listed as 'Yes', the tax rate percentage will be used to amend the total of the Invoice.
Tax rate percentage: As described above, this is the percentage used to add on extra tax to the cost.
Management Fee: An extra cost added to the total (pre-tax).
Facilities Improvement Fee: An extra cost added to the total (pre-tax).
Surcharge: An extra cost added to the total (pre-tax).
Template: When an Invoice is viewed, it uses a Px page to display all of the information. This template selection decides the Px page that is used for viewing the Invoice.
Meters: An Invoice can include multiple Meters. This Property lets the user select the Meters to use. From each Meter, a cost is calculated and added to the final Invoice.

A Meter percentage is applied to the calculated cost of the Meter when an Invoice is generated. For example, the calculated cost of a Meter could be split amoungst 2 Tenants by specifying a Meter percentage of 50%.

A Contract can be disabled. Once a Contract is disabled, no more Invoices can be generated using that Contract.