The 35-year-old Indonesian housewife said that she wanted to try a variety of food in Singapore, and chanced upon Lucky Plaza.
Chan then found the economy stall inside Lucky Plaza's Asian Food Mall and decided to order food from the stall.
In total, she ordered one-and-a-half bowls of rice, sweet and sour chicken, a slice of pork, one vegetable and one additional dish of sweet and sour pork.
"To my surprise, total bill for that order is $21," she recalled.
"When I asked for a receipt, they [said they couldn't give one] to me, [claiming] that the POS system was broken."