Task: Question Answering
Input (English): Problem: a worker earns $ 20 on the first day and spends $ 15 on the second day . the worker earns $ 20 on the third day and spends $ 15 on the fourth day . if this pattern continues , on which day will the worker first reach a net total of $ 80 ? 
Options: a ) 24 , b ) 25 , c ) 27 , d ) 30 , e ) 32
Output (English): b