# Multi-Level Calculation from a Sales Order

In this topic, a sales order is used to create the multi-level calculation.

## To create a multi-level calculation from a sales order

- Create a sales order for an item with an assembly.
- On the
**Lines**FastTab, choose**Line > Calculation**.- If a single calculation is available for the sales document line, the
**Calculation Card**opens with the existing calculation. - If no or multiple calculations exist, the
**Calculations**page opens. Choose the**New**action to create a calculation or the**Edit**or**View**action to open an existing calculation.

- If a single calculation is available for the sales document line, the
- If the
**Standard Calc. Schedule No.**field is filled in on the item used in the sales document line, the standard calculation schedule is used for the new calculation. Otherwise the**Calculation Schedules**page opens for you to select a calculation schedule manually.

The values of the sales document line are transferred to the calculation header; note that the**Replenishment System**field is set to*Prod. Order*because the item has a Production BOM. - On the
**General**FastTab, turn on the**Multi-Level Calculation**toggle so that the lower-level BOMs are also calculated. Only these BOMs are accessed, not changes that have been made on the Item Cards subsequently. As a result, changes must always be made directly in the subordinate BOMs. - Choose the
**Update Calculation**action to see the calculated values.

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