 
 <prompt> ```
Every year, school dey hold book sale wey students fit sell their old books at cheaper price. Two-fifths of Lovely books fit sell for $2.50 each and the remaining ones for $2 each. How much Lovely go make if all 10 books dey sold?``` <response>: ```Lovely go sell 10 x 2/5 = 4 books for $2.50 each.
She go sell 10 - 4 = 6 books for $2 each.
Her money for the 4 books wey she sell for $2.50 go be $10.
Her money for the 6 books wey she sell for $2 each go be $12.
So, Lovely total money if all 10 books sell go be $10 + $12 = $22.

The final answer: 22.``` 