To find the total score, we need to add the scores from the first and second rounds.
First round: 3 1/3 points
Second round: 3 2/5 points
To add the fractions, we need to find a common denominator.
The denominator for 3 1/3 is 3, and the denominator for 3 2/5 is 5.
Multiplying the numerator and denominator of 3 1/3 by 3, we get 9/3.
Multiplying the numerator and denominator of 3 2/5 by 5, we get 15/5.
Now, we can add the fractions:
9/3 + 15/5 = (9*5 + 15*3)/(3*5) = (45 + 45)/15 = 90/15
Simplifying the fraction, we get:
90/15 = 6
Therefore, Jett scores a total of 6 points in both rounds. Answer: \boxed{6}.