We know that Jill spent 1/3 of her salary in clothing.
Then, letting S be the yearly salary and C the clothing bill, we can write:
[tex]C=\frac{1}{3}\cdot S[/tex]This year, the clothing bill is C = 8020.
So we can find S as:
[tex]\begin{gathered} 8020=\frac{1}{3}\cdot S \\ S=8020\cdot3 \\ S=24060 \end{gathered}[/tex]Answer: Her yearly salary is $24,060.