Alan mixed $\displaystyle{2}\frac{{3}}{{4}}\usepackage{cmbright}\Huge\$ ounces of chocolate syrup in a glass that had $\displaystyle{10}\frac{{1}}{{4}}\usepackage{cmbright}\Huge\$ ounces of milk in it. How many ounces were in the total mixture?

The total mixture had _____ ounces.