You have the Hourly Invoice templates in CORE with the Rate column. However, you have an option to hide, if needed. To do so: 

1. On the Settings > Billing & Invoices > Template Assignments screen, select the relevant template for any invoice type by clicking Choose Template.
2. On the Choose Template dialog, select Hourly in the Show option.
3. Select the relevant invoice template from the left panel and preview it.
4. On Edit Templates>Layout, select the Rate option and click Save Changes.

Check CORE Help Center for details.