247 - Resultant of couples in a 3-step pulley

$C_R = 40(16) - 30(12) + 60(8)$

$C_R = 760 \, \text{ lb}\cdot\text{in counterclockwise}$           answer
 

Solving for equivalent couple acting in the middle pulley
$12F = C_R$

$12F = 760$

$F = 63.3 \, \text{ lb}$
 

The resultant couple is composed of two 63.3 lb forces.           answer