enter the first bill stocking the inventory items with qty and price per item

create an expense account called clearing

enter the second bill and use the clearing exp account as the expense for the bill
edit the first bill, for each item, increase the amount by a portion of the total amount […]

Resolution for 'clearing exp account issue: 'how can two suppliers affect one product in qbo' available: Yes.

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

For more information about resolving issues related to clearing exp account in Quickbooks/QBO or to get support for the issue 'how can two suppliers affect one product in qbo', click the link below: