Yes, you should be able to. The Expenses should also be assigned to the same Fixed Amount Project. In the Fixed Amount Project, the "Total Includes Expenses" should be checked if you want to include the expenses on the invoice, but not bill extra for them. If you don't want them on the invoice, then make sure that the "Reimbursable" row is *not* checked in each Expense. If you run a regular "Report", that has the actual "Time", but only the first entry will show the total amount and the rest should be zero. You could import it into a spreadsheet program such as Excel or Numbers and total the Time column and then multiply that number times your rate to see how good you guesstimated.