/**
  * returns the tax rule value
  *
  * @param string $country
  * @param bool $company
  *
  * @return int|null|mixed
  */
 private function getTaxRuleValue($country, $company)
 {
     if (!$this->ruleSet->hasRule($country)) {
         return 0;
     }
     if ($company && $country !== $this->country) {
         return 0;
     }
     return $this->ruleSet->getRuleValue($country);
 }
 public static function getCalculator($ownCountry = 'DE')
 {
     $rules = new RuleSet();
     $rules->addRule(new Rule('AT', 0.2));
     $rules->addRule(new Rule('BE', 0.21));
     $rules->addRule(new Rule('BG', 0.2));
     $rules->addRule(new Rule('CY', 0.19));
     $rules->addRule(new Rule('CZ', 0.21));
     $rules->addRule(new Rule('DE', 0.19));
     $rules->addRule(new Rule('DK', 0.25));
     $rules->addRule(new Rule('EE', 0.2));
     $rules->addRule(new Rule('EL', 0.23));
     $rules->addRule(new Rule('ES', 0.21));
     $rules->addRule(new Rule('FI', 0.24));
     $rules->addRule(new Rule('FR', 0.2));
     $rules->addRule(new Rule('GB', 0.2));
     $rules->addRule(new Rule('IE', 0.23));
     $rules->addRule(new Rule('IT', 0.22));
     $rules->addRule(new Rule('HR', 0.25));
     $rules->addRule(new Rule('HU', 0.27));
     $rules->addRule(new Rule('LV', 0.21));
     $rules->addRule(new Rule('LT', 0.21));
     $rules->addRule(new Rule('LU', 0.15));
     $rules->addRule(new Rule('MT', 0.18));
     $rules->addRule(new Rule('NL', 0.21));
     $rules->addRule(new Rule('NO', 0.25));
     $rules->addRule(new Rule('PL', 0.23));
     $rules->addRule(new Rule('PT', 0.23));
     $rules->addRule(new Rule('RO', 0.24));
     $rules->addRule(new Rule('SE', 0.25));
     $rules->addRule(new Rule('SK', 0.2));
     $rules->addRule(new Rule('SI', 0.22));
     return new Calculator($rules, $ownCountry);
 }