More advanced switching 

given($total_earnings) {
    when($_ <= 14_000) { $rate = 10.5; }
    when($_ <= 48_000) { $rate = 17.5; }
    when($_ <= 70_000) { $rate = 30.0; }
    default            { $rate = 33.0; }
};

• continue - drop through for more matches
• break - exits ‘given’ block