Expenses::prepareData

protected function prepareData(array $data)
{
	$this->data = [
		'impressions' => 0,
		'clicks' => 0,
		'actions' => 0,
		'cpc' => 0,
		'cpm' => 0,
		'spend' => 0,
		'currency' => '',
	];

	$this->data = array_merge($this->data, $data);
}