Elsa went to the store after school 4 days this week. Each day, she bought a sandwich and a comic book. She spent a total of $36 at the store this week. She paid $6 for each sandwich. How much did she pay for each comic book? (Assume she paid the same for each comic book.)
Elsa spent a total of $36 - ($6 * 4) = $<<36-(6*4)=12>>12 on comic books this week.
She bought a total of $12 / 4 = $<<12/4=3>>3 comic books.
She paid $12 / 3 = $<<12/3=4>>4 for each comic book. Answer: \boxed{4}.