You can optionally roll a child Work Order's costs into the parent Work Order, for reporting purposes.
Navigate to the Work Orders page.
Query a Work Order.
Select the Work Order to view its details.
Select the Work Relationships tab to view all relationships, related to the current Work Order, in the View All Relationships region. See: Work Order Relationships.
Choose View Cost.
Select Yes from the Include Child Work Order list of values to view costs for all children rolled up to the current Work Order.
Choose Go.