Commerce Costs

Adds cost fields to Drupal Commerce 2.x so you can determine the profit on each order item sold.

Includes a submodule for supporting resolving a product's cost by a field on the purchasable entity.

Adds a promotion for "Cost plus percent" to let you sell products at cost plus a set markup.

To do:

• Tests.
• Add fields to order item and product variation types automagically.
• Add a markup widget when editing variations so you can set price based on the markup you want.