diff --git a/src/entity/price/Price.php b/src/entity/price/Price.php
index 0ab355c..39676e1 100644
--- a/src/entity/price/Price.php
+++ b/src/entity/price/Price.php
@@ -2,6 +2,7 @@
 namespace entity\price;
 
 use entity\currency\CurrencyInterface;
+use entity\currency\Euro;
 
 /**
  *
@@ -10,14 +11,43 @@ use entity\currency\CurrencyInterface;
  */
 final class Price implements PriceInterface
 {
+    /**
+     * 
+     * @var int|null
+     */
+    private $tax;
+    
+    /**
+     * 
+     * @var int
+     */
+    private $netto;
+    
     public function getGross(): CurrencyInterface
-    {}
+    {
+        $gross = new Euro();
+        $gross->setCents($this->netto->getCents()*(100+$this->tax)/100);
+        return $gross;
+    }
 
     public function getNetto(): CurrencyInterface
-    {}
+    {
+        return $this->netto;
+    }
 
-    public function setPrice(CurrencyInterface $price): void
-    {}
+    public function setPrice(CurrencyInterface $netto): void
+    {
+       $this->netto = $netto;
+    }
+    
+    public function setTax(int $percent): void
+    { 
+        $this->tax = $percent;
+    }
+    public function getTax(): int
+    {
+        return $this->tax;
+    }
 
 }
 
diff --git a/src/entity/price/PriceInterface.php b/src/entity/price/PriceInterface.php
index 674bdd1..96cdf1e 100644
--- a/src/entity/price/PriceInterface.php
+++ b/src/entity/price/PriceInterface.php
@@ -14,7 +14,7 @@ interface PriceInterface
      * Sets the price
      * @param CurrencyInterface $price
      */
-    public function setPrice(CurrencyInterface $price):void;
+    public function setPrice(CurrencyInterface $netto):void;
     
     /**
      * Returns the netto price
@@ -27,5 +27,9 @@ interface PriceInterface
      * @return int
      */
     public function getGross():CurrencyInterface;
+    
+    public function setTax(int $percent):void;
+    
+    public function getTax():int;
 }
 
diff --git a/src/entity/price/PriceTest.php b/src/entity/price/PriceTest.php
new file mode 100644
index 0000000..398bf15
--- /dev/null
+++ b/src/entity/price/PriceTest.php
@@ -0,0 +1,51 @@
+<?php
+namespace entity\price;
+
+use PHPUnit\Framework\TestCase;
+use entity\currency\Euro;
+
+/**
+ *
+ * @author kevinfrantz
+ *        
+ */
+class PriceTest extends TestCase
+{
+    const NETTO = 100;
+    
+    const GROSS = 119;
+    
+    const TAX   = 19;
+    
+    /**
+     * 
+     * @var Price
+     */
+    protected $price;
+    
+    /**
+     * 
+     * @var Euro
+     */
+    protected $nettoEuro;
+    
+    protected function setUp():void{
+        $this->nettoEuro = new Euro();
+        $this->nettoEuro->setCents(100);
+        $this->price = new Price();
+        $this->price->setTax(self::TAX);
+        $this->price->setPrice($this->nettoEuro);
+    }
+    
+    public function testNetto():void{
+        $this->assertEquals(self::NETTO, $this->price->getNetto()->getCents());
+    }
+    
+    public function testGross():void{
+        $this->assertEquals(self::GROSS, $this->price->getGross()->getCents());
+    }
+    
+    public function testTax():void{
+        $this->assertEquals(self::TAX, $this->price->getTax());
+    }
+}
\ No newline at end of file