You do not say, but are all of the items listed in the assembly BOM inventory type items?
inventory type items are the only items with average cost, if you are using a non inventory item marked as being used in an assembly or for resale, that is the issue. When […]
Resolution for 'BOM inventory issue: 'Building an assembly causes strange entries to COGS, but why?' available: Yes.
The BOM inventory issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the BOM inventory issue yourself by looking for a resolution described in the article. If it is a complex BOM inventory issue or you are unable to solve the issue, you may contact us by clicking here or by using other BOM inventory support options.
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