#!/usr/bin/env perl
use utf8;
use strict;
use warnings;

MAIN:
{
	my $FICA_RATE = 0.0765;
	my $PAY_RATE = 20.;
	my $annual_salary;

	$annual_salary = $PAY_RATE * 2080.0;
# Single quote strings will not interpolate variables like ${annual_salary}
# Must use double quote strings if you want variable interpolation.
	print "FICA Tax Rate: ${FICA_RATE}\n";
	print "Annual Salary: ${annual_salary}\n";
	print "FICA Tax: @{[$FICA_RATE * $annual_salary]}\n";
}