Net Torque from Opposing Forces

A uniform disk of radius $R$ and mass $M$ is acted upon by two forces of equal magnitude $F$ applied perpendicular to the disk at different radii: one force is applied at the edge (distance $R$ from the center), and the second force is applied at a point $R/2$ from the center, with the two forces pushing in opposite directions (such that their torques oppose each other). What is the net torque on the disk about its center?