In Exact Online you can create composite items. You do this by creating a bill of materials for an item. Under the heading Composite item you specify which items the assembly consists of:

Composite item Exact Online

In the bill of materials you specify which items the composite item consists of. You also indicate how many of each item are used for the assembly:

Item maintenance

In a sales order in the Barcode Scan App you can then see which items the composite item consists of:

Composite item