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<?php
declare(strict_types=1);
namespace byrokrat\billing;
use byrokrat\amount\Amount;
/**
* Basic billable implementation
*/
class SimpleItem implements Billable
{
* @var string
private $description;
* @var Amount
private $unitCost;
* @var int
private $units;
private $vat;
* Set immutable data at construct
*
* Note that a VAT of 25% is represented as .25
public function __construct(string $description, Amount $unitCost, int $units = 1, Amount $vat = null)
$this->description = $description;
$this->unitCost = $unitCost;
$this->units = $units;
$this->vat = $vat ?: new Amount('.25');
}
public function getBillingDescription(): string
return $this->description;
public function getCostPerUnit(): Amount
return $this->unitCost;
public function getNrOfUnits(): int
return $this->units;
public function getVatRate(): Amount
return $this->vat;
byrokrat /
billing
