The high end of the expenses assumes maximum travel expenses of $2500, which often are not included in COA at many other schools. If a student is on FA, s/he likely won’t have her/his travel expenses fully covered. I believe the FA formula usually covers 2 round trips annually based at year-round average cost. That’s why many students on FA (including full ride) don’t go home on major holidays when the costs are significantly higher than average.