The monetary figure that appears next to logged hours on a time entry represents the amount of money you've earned for those hours against a particular project.
Let's say your hourly rate for your "Website Maintenance" project is $100, and you log 3 hours on that project: your entry will state "3:00 - $300" (3 hours x $100/hr = $300).
We do the math for you!
The amount of money you earn depends on the hourly rate you set for a project. If you set a project budget to be "Not Billable", time entries will only show logged hours.
From the Hours page, you'll find your total logged and planned hours on the header of your Day, Week and Month views. This gives you an idea of what you've already earned, and what you can expect to make from upcoming work.
Head to the Project page for an overview of budget progress, logged and planned hours & money, and un-billed hours across all projects.