I had completely forgotten about this, however,
Ping randomly stumbles across a mushroom and decides to eat it. It is a mushroom with the street name "loli-heart" such that Ping decides to go back to his elementary school, and pretend to be a student there. He then takes one home with him, and attempts to raise her. He doesn't realize the cost of raising a child nor how much it costs to feed them.
-2000 for starting off = 10,000
The Parents agree to let Ping have her every other week (for some ungodly reason).
Ping's translation rate grows, he suddenly gains 20,000 credits = 30,000 credits (over a month)
However, the child and living also cost him a lump sum of 25,000 = 5,000 credits (over a month.)
5,000 credits.

...and a month later.