Object field not being seen as an option in Chart column

Hi,

I am trying to create a chart that shows the sum of all Opportunities closed this year, by Account. I am able to create one that shows the count of all Opps by Account but not sum. When I try to do this via the Account name as the column I do not have that option. If I go to related Objects and choose Account there is also not an option to choose Name. How do I add that field to the available fields in a chart?

Thank you.