Cheque paid with dollars and cents swapped

A bank clerk cashing a man's cheque mixed up the units: the cents figure was paid out as dollars and the dollars figure as cents. The man, who arrived with no money, did not count it, bought a 5-cent sweet, and then found that what he had left was precisely double the cheque's face value. What was the cheque for?

$31.63. Let the cheque be $x$ dollars and $y$ cents. Then $100y+x-5=2(100x+y)$, i.e. $98y=199x+5$, whose solution with $0\le y\le 99$ is $x=31$, $y=63$. Check: he received $63.31, and after 5 cents has $63.26, twice $31.63.