Saul realized that selling food by the wagon load to large users was better business than selling to individuals .
In 1919 , their son Saul returned from military service in World War I and rejoined his parents ' grocery store .
Saul realized that selling food by the wagon load to large users was better business than selling to individuals .
In 1919 , their son Saul returned from military service in World War I and rejoined his parents ' grocery store .