public function delivery(Money $delivery)
    {
        if ($this->price->isSameCurrency($delivery)) {
            $this->delivery = $delivery;
        }
    }
public function delivery(Money $delivery)
    {
        if ($this->price->isSameCurrency($delivery)) {
            $this->delivery = $delivery;
        }
    }
public function delivery ( Money $ delivery ) { if ( $ this -> price -> isSameCurrency ( $ delivery ) ) { $ this -> delivery = $ delivery ; } }
Set the delivery charge

@param Money $cost

@return void
Set the delivery charge