have an idea. You're right, 31%.

some of their waste oils are being processed and extracted to become standard oils, which are still being used.

some of their waste oil was also sold to restaurants at low prices in secret. (But their oil is sold to restaurants, and the standard of that oil is up to standard.)

Their oil is bought to the factory for manufacturing.

are you satisfied with this answer? Now you don't have to think about which restaurant you go to for dinner. Is it waste oil? Ha ha. . Out of sight, out of mind, don't pursue so many things, so as not to feel uneasy when eating. I remember that when I used to eat ham sausage, I always wanted to throw up once. Ha ha.