 
 <prompt> ```Sally dey teach primary school and dem give am $320 make she spend on top books for her students. One reading book dey cost $12 and she get 30 students for her class. Unfortunately, if the money wey dem give am no reach to pay for all the books, she go need to use her own money pay the rest. How much money Sally go need to use from her own pocket, to buy book for every student?``` <response>: ```To buy one book for each student, Sally go need: 30 x $12 = $360.
So she go need pay $360 - $320 = $40 from her pocket.

The final answer: 40.``` 