Xiao Ming borrows 500 yuan from his father, borrows 500 yuan from his mother to buy a pair of shoes. It costs 970 yuan, and there are 30 yuan left. Xiao Ming returns 10 yuan to his mother. His father keeps 10 yuan. It is known that Xiao Ming returns 10 yuan to his father. His mother still owes 490 yuan to his father. His mother 490 yuan 490 + 490 = 980 yuan, and Xiao Ming 10 yuan equals 990 yuan. Where is the remaining 10 yuan?

Xiao Ming borrows 500 yuan from his father, borrows 500 yuan from his mother to buy a pair of shoes. It costs 970 yuan, and there are 30 yuan left. Xiao Ming returns 10 yuan to his mother. His father keeps 10 yuan. It is known that Xiao Ming returns 10 yuan to his father. His mother still owes 490 yuan to his father. His mother 490 yuan 490 + 490 = 980 yuan, and Xiao Ming 10 yuan equals 990 yuan. Where is the remaining 10 yuan?

There is something wrong with the logic of this statement. Returning 10 yuan to my father and 10 yuan to my mother is equivalent to borrowing 490 yuan from my father and mother and buying 970 yuan for a pair of shoes. The remaining 10 yuan is in Xiaoming's hands