Answer:
$159.95
Explanation:
Let price of trumphet be defined by
![x](https://img.qammunity.org/2020/formulas/mathematics/middle-school/k3ozza40nv61jy1offmxaxutrb6y1c3ly5.png)
price of clarinet = $139.95
Number of clarinets sold = 19
Earning through clarinets' sale =
![19*139.95 = 2659.05](https://img.qammunity.org/2020/formulas/mathematics/middle-school/rmmxl385aibl2sxwqxiwettq196x728ys4.png)
Total earning of store = $4578.45
Earning through trumphets' sale =
![4578.45 - 2659.05 = 1919.40](https://img.qammunity.org/2020/formulas/mathematics/middle-school/gn8nj6kw2qa6rr0uo2c7enh5h470webkz0.png)
price of one trumohet =
![(1919.40)/(12) = 159.95](https://img.qammunity.org/2020/formulas/mathematics/middle-school/o65die6qt0moklshwn9xz8qoqzlred5h1a.png)
price of clarinet = $159.95