Physics: Principles with Applications (7th Edition)

$\tau = 1.2~m\cdot N$ (clockwise)
We calculate the net torque through the formula: $\tau = (\sum r\cdot F) - \tau_f$ $\tau = (0.24~m)(18~N) + (0.12~m)(35~N) - (0.24~m)(28~N) - 0.60~m\cdot N$ $\tau = 1.2~m\cdot N$ (clockwise)