sub euroCalc
{
	my ($self,$amount, $from,$to) = @_;
	croak("Invalid start currency") unless defined($rates{uc $from});
	croak("Invalid target currency") unless defined($rates{uc $to});
	
	# What was it in Euros
	# $amount = ($amount * $rates{$to}) / $rates{$from};
	# Now convert to target currency
	# return $amount * $rates{$to};
	
	# Or in one line
	return ($amount * $rates{$to}) / $rates{$from};
}