A pen costs Rs. 13 and a note book costs Rs. 17. A school spends...

A pen costs Rs. 13 and a note book costs Rs. 17. A school spends exactly Rs. 10000 in the year 2017-18 to buy $x$ pens and $y$ note books such that $x$ and $y$ are as close as possible (i.e. $|x-y|$ is minimum). Next year, in 2018-19, the school spends a little more than Rs. 10000 and buys y pens and $x$ note books. How much more did the school pay?