 
 <prompt> Joy get 30 pencils, Colleen get 50 pencils. If dem buy the pencils for $4 each for store, how much money Colleen pay pass Joy for her pencils? <response>: ```The number of pencils wey Colleen get pass Joy na 50-30 = 20 pencils.
If each pencil dey sell for $4, Colleen pay $4*20 = $80 extra for the 20 pencils wey she get pass Joy.

The final answer: 80.``` 