What the USsent in basic supplies, the South Korean government made up for in cash payments.

CENTERFORSECURITYPOLICY: Center for Security Policy | Contain and Transcend: A Strategy for Regime Change in North Korea | Page: 3

More than 120 South Korean firms employed about 53, 000 North Koreans to make basic products such as shoes and bags.

WSJ: North Korea Fires Another Missile Sunday