Odoo adding a custom field to accounting invoice dashboard

I am looking for an Odoo developer to add a custom field(purchase cost of goods sold from the invoice) to my accounting invoice dashboard. The ideal candidate should have experience with Odoo development and be familiar with the accounting module.

Requirements:
- Add a custom number field to the accounting invoice dashboard
- The custom field should be displayed at the top of the dashboard
- The project needs to be completed ASAP

Skills and experience:
- Odoo development
- Familiarity with the accounting module
- Ability to add custom fields to the dashboard