diff --git a/Localization/Localization.php b/Localization/Localization.php
index 8c0c9bfaa..edfdb6a18 100644
--- a/Localization/Localization.php
+++ b/Localization/Localization.php
@@ -359,7 +359,7 @@ class Localization
      */
     public function setAngle(string $angle)
     {
-        $this->temperature = $angle;
+        $this->angle = $angle;
     }
 
     /**
@@ -381,7 +381,7 @@ class Localization
      * @since  1.0.0
      * @author Dennis Eichhorn <d.eichhorn@oms.com>
      */
-    public function setTemperatur(string $temperature)
+    public function setTemperature(string $temperature)
     {
         $this->temperature = $temperature;
     }
diff --git a/Localization/Money.php b/Localization/Money.php
index 1676f0bf0..492131381 100644
--- a/Localization/Money.php
+++ b/Localization/Money.php
@@ -53,6 +53,22 @@ class Money implements \Serializable
      */
     private $decimal = '.';
 
+    /**
+     * Currency symbol position
+     *
+     * @var string
+     * @since 1.0.0
+     */
+    private $position = 1;
+
+    /**
+     * Currency symbol.
+     *
+     * @var string
+     * @since 1.0.0
+     */
+    private $symbol = ISO4217SymbolEnum::_USD;
+
     /**
      * Value.
      *
@@ -118,6 +134,8 @@ class Money implements \Serializable
      * @param string $symbol    Currency symbol
      * @param int    $position  Symbol position
      *
+     * @return Money
+     *
      * @since  1.0.0
      * @author Dennis Eichhorn <d.eichhorn@oms.com>
      */
@@ -127,6 +145,8 @@ class Money implements \Serializable
         $this->decimal   = $decimal;
         $this->symbol    = $symbol;
         $this->position  = $position;
+
+        return $this;
     }
 
     /**
@@ -158,7 +178,7 @@ class Money implements \Serializable
      */
     public function getCurrency(int $decimals = 2) : string
     {
-        return ($position === 0 ? $smbol : '') . $this->getAmount($decimals, $thousands, $decimal) . ($position === 1 ? $smbol : '');
+        return ($this->position === 0 ? $this->symbol : '') . $this->getAmount($decimals) . ($this->position === 1 ? $this->symbol : '');
     }
 
     /**
@@ -199,6 +219,8 @@ class Money implements \Serializable
             $this->value += $value;
         } elseif ($value instanceof Money) {
             $this->value += $value->getInt();
+        } else {
+            throw new \InvalidArgumentException();
         }
 
         return $this;
@@ -235,8 +257,11 @@ class Money implements \Serializable
             $this->value -= $value;
         } elseif ($value instanceof Money) {
             $this->value -= $value->getInt();
+        } else {
+            throw new \InvalidArgumentException();
         }
 
+
         return $this;
     }
 
diff --git a/Log/FileLogger.php b/Log/FileLogger.php
index 93a32da8a..15e5c317f 100644
--- a/Log/FileLogger.php
+++ b/Log/FileLogger.php
@@ -317,7 +317,7 @@ class FileLogger implements LoggerInterface
             $this->fp = false;
         }
 
-        if ($this->verbose || php_sapi_name() === 'cli') {
+        if ($this->verbose) {
             echo $message, "\n";
         }
     }
diff --git a/Math/Finance/FinanceFormulas.php b/Math/Finance/FinanceFormulas.php
index 8dac877a9..260b9010e 100644
--- a/Math/Finance/FinanceFormulas.php
+++ b/Math/Finance/FinanceFormulas.php
@@ -34,7 +34,7 @@ class FinanceFormulas
     /**
      * Annual Percentage Yield
      *
-     * @latex APY = \left(1+ \frac{r}{n}\right)^{n}-1
+     * @latex  APY = \left(1+ \frac{r}{n}\right)^{n}-1
      *
      * @param float $r Stated annual interest rate
      * @param int   $n number of times compounded
@@ -52,7 +52,7 @@ class FinanceFormulas
     /**
      * Annual Percentage Yield
      *
-     * @latex r = \left(\left(APY + 1\right)^{\frac{1}{n}} - 1\right) \cdot n
+     * @latex  r = \left(\left(APY + 1\right)^{\frac{1}{n}} - 1\right) \cdot n
      *
      * @param float $apy Annual percentage yield
      * @param int   $n   Number of times compounded
@@ -437,7 +437,7 @@ class FinanceFormulas
      */
     public static function getPeriodsOfPVAD(float $PV, float $P, float $r) : int
     {
-        return (int) round((($PV - $P) / $P * $r - 1) / log(1 + $r) + 1);
+        return (int) round(-(log(-($PV - $P) / $P * $r + 1) / log(1 + $r) - 1));
     }
 
     /**
@@ -572,6 +572,40 @@ class FinanceFormulas
         return $P * (pow(1 + $r, $n) - 1);
     }
 
+    /**
+     * Principal of compound interest
+     *
+     * @param float $C Compound interest
+     * @param float $r Rate per period
+     * @param int   $n Number of periods
+     *
+     * @return float
+     *
+     * @since  1.0.0
+     * @author Dennis Eichhorn
+     */
+    public static function getPrincipalOfCompundInterest(float $C, float $r, int $n) : float
+    {
+        return $C / (pow(1 + $r, $n) - 1);
+    }
+
+    /**
+     * Principal of compound interest
+     *
+     * @param float $P Principal
+     * @param float $C Compound interest
+     * @param float $r Rate per period
+     *
+     * @return float
+     *
+     * @since  1.0.0
+     * @author Dennis Eichhorn
+     */
+    public static function getPeriodsOfCompundInterest(float $P, float $C, float $r) : float
+    {
+        return log($C / $P + 1) / log(1 + $r);
+    }
+
     /**
      * Continuous Compounding
      *
@@ -589,6 +623,57 @@ class FinanceFormulas
         return $P * exp($r * $t);
     }
 
+    /**
+     * Continuous Compounding
+     *
+     * @param float $C Compounding
+     * @param float $r Rate per period
+     * @param int   $t Time
+     *
+     * @return float
+     *
+     * @since  1.0.0
+     * @author Dennis Eichhorn
+     */
+    public static function getPrincipalOfContinuousCompounding(float $C, float $r, int $t) : float
+    {
+        return $C / exp($r * $t);
+    }
+
+    /**
+     * Continuous Compounding
+     *
+     * @param float $P Principal
+     * @param float $C Compounding
+     * @param float $r Rate per period
+     *
+     * @return float
+     *
+     * @since  1.0.0
+     * @author Dennis Eichhorn
+     */
+    public static function getPeriodsOfContinuousCompounding(float $P, float $C, float $r) : float
+    {
+        return log($C / $P) / $r;
+    }
+
+    /**
+     * Continuous Compounding
+     *
+     * @param float $P Principal
+     * @param float $C Compounding
+     * @param float $t Time
+     *
+     * @return float
+     *
+     * @since  1.0.0
+     * @author Dennis Eichhorn
+     */
+    public static function getRateOfContinuousCompounding(float $P, float $C, float $t) : float
+    {
+        return log($C / $P) / $t;
+    }
+
     /**
      * Current Ratio
      *
diff --git a/Uri/Http.php b/Uri/Http.php
index 7c9bf561e..d4756a623 100644
--- a/Uri/Http.php
+++ b/Uri/Http.php
@@ -204,7 +204,7 @@ class Http implements UriInterface
      */
     public function getRootPath() : string
     {
-        return $this->rootPath ?? '';
+        return $this->rootPath;
     }
 
     /**
diff --git a/Uri/UriFactory.php b/Uri/UriFactory.php
index 89b0ed548..9e2d70d7d 100644
--- a/Uri/UriFactory.php
+++ b/Uri/UriFactory.php
@@ -116,7 +116,7 @@ class UriFactory
             }
         }
 
-        return success;
+        return $success;
     }
 
     /**
diff --git a/Utils/Parser/Markdown/Markdown.php b/Utils/Parser/Markdown/Markdown.php
index 2b79709c2..5615ea09c 100644
--- a/Utils/Parser/Markdown/Markdown.php
+++ b/Utils/Parser/Markdown/Markdown.php
@@ -82,10 +82,12 @@ class Markdown
 
     public function parse(string $raw) : string
     {
-        $raw   = $this->cleanup($raw);
+        /*$raw   = $this->cleanup($raw);
         $lines = explode("\n", $raw);
 
-        return trim($this->parseLines($lines), " \n");
+        return trim($this->parseLines($lines), " \n");*/
+
+        return $raw;
     }
 
     private function cleanup(string $raw) : string