He has only one $50 note in his wallet.
While making payment, he asked the staff if they have change for big note and offered to give her 60 cents.
He dug into his recycle bag for a long time trying to find his coins. Ended up he only had 50 cents, short of 10 cents.
The staff told him, "Never mind," and returned him $48.
At 5pm, the man went to buy another two chicken bun from the same shop.
He told the same staff to charge him $2.70 as he owed her 10 cents earlier.
She took a look at him again as he was wearing a mask.