Vertically filled division

Logic Level 1

\[ \LARGE{ \require{enclose} \begin{array}{rll} \phantom{0}\ \boxed{7} && \\[-2pt] \boxed{{\phantom0}}\ \enclose{longdiv}{\boxed{\phantom0} \ \boxed{5}}\kern-.2ex \\[-2pt] \underline{\boxed{\phantom{0}} \ \boxed{3}} && \\[-2pt] \boxed{{2}} \end{array} } \]

Find the sum of all the missing digits that satisfy the long division above.