How much money you need if you only eating from Amma canteen for a year

Assuming
Amma canteen near to you.
It will open 3 times
You can eat idli/pongal/.. items from amma menu
average price: 5 rs for any item 5 idli or pongal

one day cost: 3 *5 -> 15
one week cost: 7 * 15 -> 105
one month cost: 30 * 15 -> 450
3 months cost: 3 * 450 -> 1350
6 months cost: 2700
1 year cost: 5400