You have the option of setting "Calculated Pricing" for products vs. setting fixed prices. Such products, referred to as "Calculated Products," can be used for shipping, per diems, or anything else you want to account for that is not a "piece of equipment."
Existing products in your catalog cannot be converted to use calculated pricing. Only new products can be set to use calculated pricing when they are being added.
Calculated products do not calculate off of other items, i.e., the price of a calculated item (product, labor, or allowance) cannot be used for a calculated product.
To use calculated pricing on a product, when creating the new product, click the Calculated radio button on the Price tab.
There are various options to set the value for the unit cost and unit price for the calculated product.
Source
First, you choose a Source field. You can select a Total field from the dropdown or set the source to be Unit Price, Margin, or Markup.
The Recalculate Automatically option is checked by default.
When checked, this will automatically update the unit cost or unit price of the product within a project when the value for the source changes.
If you do not have this box checked, you can still manually recalculate the price for a calculated product within a project.
Operation
Next, you choose an operation from the following list.
Value
Once you've chosen an operation, you can then set a value. The value will either be a percentage or a decimal number based on the operation chosen.
Filters
You have the option of setting one or more of the following filters shown in the image below.
The "Current Parent Item" is pre-selected, as this is very likely the behavior you will want for calculated products, primarily to maintain the expected pricing when a quantity greater than one is split into various quantities.
The location and system options allow you to choose whether or not to include sublocations and subsystems.
If you do not choose a filter when using a "Total" Source, the project total for that source will be used.
Tax
The tax fields will vary depending on the Tax Settings in the Control Panel.