He was able to make multiple sales in order to make extra income, spending so much time in the store that he had no time to go out and play with friends in the neighborhood. It did not take a long time for him to realize, however, that he can only do so much in a sari-sari store environment.
WWII came and the sari-sari store was looted and burned. He did a lot of buying and selling of odd things during the war to enable the family to survive.