Detailed Instructions: The task is to generate the correct answer for a given math problem.
Q: Problem: the cost of 8 dozen pencil and 2 dozen note book is 520 rupee . if cost of 3 pencil and 4 note book is 60 rupee , then sum of the cost of 1 pencil and 1 note book will be ( in rupee )
A:
rs 15.51