$city and $units are single values.

Goal

Assign a city and say it.

use strict;
use warnings;
use feature 'say';

my $city = "Nairobi";
say $city;

use strict;
use warnings;
use feature 'say';

my $units = 12;
$units = $units + 1;
say $units;

use strict;
use warnings;
use feature 'say';

my $price = 40;
say $units = 8;
say $price;

use strict;
use warnings;
use feature 'say';

my $stall = "Kisumu";
say $stall;