This field is only relevant for sublines belonging to another sales line and used to invoice costs or services for that other sales line (see the example below). The field is automatically filled with the invoicing method specified for the part on the Sales tab in the Parts module. You can change the invoicing method, however.

A part that is related to another part can automatically be invoiced when you invoice the main part. To do so, in a sales order, create one sales line for the main part ('Display'), and include a subline for the related part ('Administrative charges').

The part on the subline will now automatically be included when the invoice is created for the main part, although you must have specified how the invoice sum of the subline should be processed. You can specify the processing method in the Invoicing method field.

You can choose from the following options:

Not applicable:	Use this option for parts that are not of the 'Costs' or 'Services' type.
No link:	There is no direct link between the shipment of the actual parts and the invoicing of costs or services. The costs and services will therefore not be invoiced via the shipping notes. If you choose 'No link', you could, for example, manually create invoices for costs and services. In the invoicing stage, you choose the invoice on which the costs or services must be included.
Include in direct proportions:	Invoicing of costs and services is based on the number of actual parts shipped. For instance, if a quarter of the parts has been shipped, a quarter of the invoice sum for costs or services will be included on the sales invoice.
Include once on first shipment:	The costs or services will be invoiced when the first shipment is made.
Include once on completion of last shipment:	All costs or services will be invoiced when the last shipment is made as soon as the shipment is confirmed as complete.
Include for every shipment:	The full amount of the costs or services specified will be charged for every shipment.

On subline 001 you can specify an invoicing method. If you want to invoice the part 'Administrative charges' in full once, you can choose between 'Include once on first shipment' and 'Include once on line completion'.

If this check box has been selected, this sales line will be invoiced using the periodic invoicing method. When you add periods by clicking the Periodic invoices button on the Sales orders form, the order sum calculation will be based only on sales lines for which the Periodic invoicing check box has been selected.

Do not select this check box if you do not want to use periodic invoicing for this sales line.

Sales lines can still be marked for periodic invoicing at a later stage, as long as no sales invoices have been created for the sales lines concerned.

You can use the periodic invoicing method even if you are using the cost-plus invoicing method. To do so, select this check box and follow the usual steps for periodic invoicing. Settlement will take place on the final period.

By default, the setting of this field will be copied from the parent sales offer or order.

Use this field to specify that you want to use cost-plus invoicing. The cost-plus invoicing methods available from the list box depend on the type of part selected on the sales line: For parts of the 'Production part' or 'Purchase part' type, you can choose 'Pricing based on actual costs', and for parts of the 'Costs' or 'Services' type you can choose 'Cost-plus specification invoicing'. The 'Cost-plus invoicing' button is available only if this field is set to 'Cost-plus specification invoicing' or 'Pricing based on actual costs'.

Choose 'Not applicable' if you do not want to use cost-plus invoicing.

By default, the setting of this field will be copied from the parent sales offer or order.

If the Type field indicates that cost-plus invoicing should be used, you can specify the cost-plus invoicing type in the other Type field. By default, the setting of this field will be copied from the parent sales offer or order.

For cost-plus invoicing this is an important field, as it determines the invoicing method:

Actual costs are processed: For all actual costing components, you can control whether they are to be included in the cost-plus specification. If the costs are to be taken into account, you can often specify how they are to be taken into account.

Actual costs are cumulated: The cumulation level of the actual costing determines how costs are cumulated before the cost-plus specification is created. A cumulation level can be set only if the corresponding setting of the Process actual costing process is not 'Do not process'.

Sums are grouped on the invoice, either for the full invoice or by calculation component. If a grouping option is applied, you can specify a description to be used for this group.

If this check box is selected, the sales line has been released for cost-plus invoicing.