If Goosen had won outright at -143, your return would have been $100.00 + $69.93 = $169.93. Under the "dead heat" rule, 1/2 was a winning wager, but 1/2 was a losing wager (Fujita a winner). Hence, $100.00 in on the wager, and $50.00 + $34.97 = $84.97 back at the end.
If your wager was on someone with odds of at least +101, you would end up with an overall profit instead of an overall loss in your "dead heat". If Westwood is wagered at +150 vs. Kuchar/Kaymer, and Westwood then ties with Kuchar in beating Kaymer, your $100.00 in on the wager returns $50.00 + $75.00 = $125.00 back at the end on the winning 1/2 portion, for a $25.00 profit. But if all 3 players tie in the Westwood example, you win 1/3 of your wager and lose 2/3, so your return on the $100.00 would only be $33.33 + $50.00 = $83.33, for a $16.67 loss.
I apologize if any of my numbers or calculations are off by a bit.
GL