Decoder

Well! We got fed and it was time to pay our dues, the most difficult part. The amount was in pure tamil and I had to resort to child's play. Showed them ten fingures, holding them up as if teaching a kid what is ten quantitatively. The husband blinked his ten fingers twice and then five. Message through! Twenty fives rupees is the damage for 3 mutte-dosas, 2 plain dosas and 2 glasses of tea! While number decoding was just about to end, this lady (proly, mother of either husband or wife) proclaims twenty-five! QED!