The Budget Items tab is not adding up all the values added in the details. You are only taking into account the values added in the suppliers. The costs with internal expenses or resources are not included in the total of the sales lines (Items).
Prevent Future Issues
- Add to the User form the role "EstimateSave"
- Go to the Estimates module;
- Click on an Estimate
- Verify that were added the costs in the Estimate Items tab and sub totals relative to the costs in the details tab.