You added a $\displaystyle\text{\$}{25}\usepackage{cmbright}\Huge\$ fee for each ticket, when the fee was for the entire order. The amount that you need to calculate is $\displaystyle{7}{\left(-{28}\right)}+{\left(-{25}\right)}\usepackage{cmbright}\Huge\$ . The correct answer is $\displaystyle-\text{\$}{221}\usepackage{cmbright}\Huge\$ .