Upvote:3
If you've tracked all your expenses in Splitwise, you can use its reporting tools for this.
Go to "All Expenses" and choose the trends button
Then click "view full charts"
You'll get a month-by-month breakdown of your expenses (be sure to check all months if your trip covered more than one) broken down by the total spending, what you paid for, your share, and your net balance. The sum of the "Your Share" column is your total expense.