QB Issue Resolution:

You don’t really have to change anything.  When you use the new cost on a vendor bill it will flow thru to COGS – either directly or thru inventory.

Resolution for Issue 'How to change the cost of the goods if the price increase?' available: Yes (Solved).
Source: Intuit Community forum.

How to change the cost of the goods if the price increase?: this 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 issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

Support for Inventory
Quickbooks Repair Pro will resolve it efficiently and affordably. Guaranteed resolution of your issue, or you pay nothing!

Error Recovery for Inventory [Canada]
E-Tech is the #1 Quickbooks data migration and Conversion service provider.

Get 50% off Quickbooks Online

Click Here for 50% off!

Additional Support Options: