One grid represents five books, and the statistics are as follows: category literature, science and technology education, children's books and periodicals, social science picture book (Ben) 42392327130 ① 42+39+23+27+1+30 =/kloc.

I sold 172 books yesterday.

②42×29= 12 18 (Ben);

A: A * * * can sell 12 18 books.

③1181÷27 = 43 (days) ... 20 (Ben);

Answer: 43 days is enough, and there are 20 copies left.