The total score is the combined score of each round for the four players who scored the lowest total. In your case the total was 1129 points. The combined under par for the same group is -23. I think the confusing thing might be that it could be different players in each round. The bonus structure is -15 points if you pick winner, -10 if you pick second place, and -5 if you pick 3rd. That amount is subtracted from your initial foursome scores (4 players x 4 rounds). In your case did not have any of the top 3 in your 6 players so you did not get any points. If you did, it would get subtracted from the 1129.

As example, your four best players shoot in the first round 70, 69, 69, and 65. Your total for that round is 273. Each round generates another score based on how your players do. So let's say the next three are 272, 269, and 268. Your total score is 1,082 points (subtotal on the leader board). Any bonus points are subtracted from that (Final Bonus). If you had the 2nd place guy on your team you would subtract 10 from the total so your new total is 1,072 (Total). The places are based on the Total score.