You may have rounded 54.90 to 60 and 64.95 to 70 (with an estimate of 10 for the tie). While these estimates are close, a more accurate estimate is provided by rounding the first amount to 55 and the second to 65. This would give you an estimated total of $\displaystyle{55}+{65}+{10}={130}\usepackage{cmbright}\Huge\$ . The correct answer is $130.