diff --git a/config/config.php b/config/config.php
index 985b250..137a7d0 100644
--- a/config/config.php
+++ b/config/config.php
@@ -3,34 +3,28 @@
 return [
     /*
      * ---------------------------------------------------------------
-     * formatting
+     * Formatting
      * ---------------------------------------------------------------
-     *
-     * the formatting of shopping cart values
      */
-    'format_numbers' => env('SHOPPING_FORMAT_VALUES', false),
+    'format_numbers' => env('LARAVEL_CART_FORMAT_VALUES', false),
 
-    'decimals' => env('SHOPPING_DECIMALS', 0),
+    'decimals' => env('LARAVEL_CART_DECIMALS', 0),
 
-    'dec_point' => env('SHOPPING_DEC_POINT', '.'),
+    'dec_point' => env('LARAVEL_CART_DEC_POINT', '.'),
 
-    'thousands_sep' => env('SHOPPING_THOUSANDS_SEP', ','),
+    'thousands_sep' => env('LARAVEL_CART_THOUSANDS_SEP', ','),
 
     /*
      * ---------------------------------------------------------------
-     * persistence
+     * Persistence
      * ---------------------------------------------------------------
-     *
-     * the configuration for persisting cart
      */
     'storage' => null,
 
     /*
      * ---------------------------------------------------------------
-     * events
+     * Events
      * ---------------------------------------------------------------
-     *
-     * the configuration for cart events
      */
     'events' => null,
-];
\ No newline at end of file
+];
diff --git a/src/Cart.php b/src/Cart.php
index 2730e91..2e31a0c 100644
--- a/src/Cart.php
+++ b/src/Cart.php
@@ -569,7 +569,7 @@ public function getSubTotalWithoutConditions($formatted = true)
      *
      * @param  bool  $formatted
      */
-    public function getSubTotal($formatted = true): int|float
+    public function getSubTotal($formatted = true): int|float|string
     {
         $subTotal = 0.00;
         // add all the items together with conditions applied
diff --git a/src/CartCondition.php b/src/CartCondition.php
index dceb8f4..344240d 100644
--- a/src/CartCondition.php
+++ b/src/CartCondition.php
@@ -78,7 +78,7 @@ public function getAttributes()
     /**
      * the value of this the condition
      */
-    public function getValue(): int|float
+    public function getValue(): int|float|string
     {
         return $this->args['value'];
     }
diff --git a/src/Helpers/Helpers.php b/src/Helpers/Helpers.php
index 11c0099..5bd14ea 100644
--- a/src/Helpers/Helpers.php
+++ b/src/Helpers/Helpers.php
@@ -63,7 +63,7 @@ public static function formatValue($value, $formatNumber, $config)
         if ($formatNumber || $config['format_numbers']) {
             return floatval(number_format($value, $config['decimals'], $config['dec_point'], $config['thousands_sep']));
         } else {
-            return $value;
+            return floatval($value);
         }
     }
 }
diff --git a/tests/Unit/CartConditionsTest.php b/tests/Unit/CartConditionsTest.php
index 002f222..55ffc78 100644
--- a/tests/Unit/CartConditionsTest.php
+++ b/tests/Unit/CartConditionsTest.php
@@ -790,7 +790,7 @@
         expect($this->cart->getCalculatedValueForCondition('Gift Card'))->toEqual(0, 'Gift Card should be 0');
         expect($couponDiscount->getCalculatedValue())->toEqual(200.0, 'Coupon Discount value should be 200.0');
         expect($giftCard->getCalculatedValue())->toEqual(0, 'Gift Card value should be 0');
-    })->only();
+    });
 });
 
 describe('item level conditions', function () {
diff --git a/tests/Unit/CartTest.php b/tests/Unit/CartTest.php
index a4eaad3..d3fcc6b 100644
--- a/tests/Unit/CartTest.php
+++ b/tests/Unit/CartTest.php
@@ -38,7 +38,7 @@
         expect($this->cart->getContent()->count())->toEqual(1, 'Cart content should be 1');
         expect($this->cart->getContent()->first()['id'])->toEqual(1, 'Item added has ID of 1 so first content ID should be 1');
         expect($this->cart->getContent()->first()['price'])->toEqual(10099, 'Item added has price of 100.99 so first content price should be 100.99');
-    })->only();
+    });
 
     test('can add an item with no price', function () {
         $this->cart->add(455, 'Sample Item', 0, 2, []);