QBO use FIFO & Enterprise uses Average cost.

Change you preferences to FIFO in Enterprise.

Resolution for 'converted a company issue: 'I have converted a company file created in QBO to Enterprise.' available: Yes.

The converted a company 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 converted a company issue yourself by looking for a resolution described in the article. If it is a complex converted a company issue or you are unable to solve the issue, you may contact us by clicking here or by using other converted a company support options.

For more information about resolving issues related to converted a company in Quickbooks/QBO or to get support for the issue 'I have converted a company file created in QBO to Enterprise.', click the link below: