How to run an aggregate function like SUM on two columns in JPA and display their results?

I am new to JPA. So my question should be so simple to some.

Below is the Simple Query in SQL which i would like to convert to JPA. I already have an entity class called TimeEnt.

SELECT 
     SUM(TimeEntryActualHours) as UnBilledHrs,
     SUM (TimeEntryAmount) as UnbilledAmount
FROM TimeEnt WHERE MatterID = 200