We have the formula:
[tex]M=S-N[/tex]where M is the mark down, S is the original price and N is the reduced price. Plugging the values we know:
[tex]\begin{gathered} 9.28=S-6.67 \\ S=9.28+6.67 \\ S=15.95 \end{gathered}[/tex]Therefore the original price was $15.95