Joseph's final score in the video game is 97 points.
To find Joseph's final score, we need to add up his points earned and subtract his points lost. He earned 80 points and then lost 30, so his score is now 80 - 30 = 50. After that, he earned 97 points, bringing his score to 50 + 97 = 147. Finally, he lost 50 more points, resulting in a final score of 147 - 50 = 97.
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