diff --git a/src/Cart/CartManager.php b/src/Cart/CartManager.php
index d909b246..c1c234cd 100644
--- a/src/Cart/CartManager.php
+++ b/src/Cart/CartManager.php
@@ -70,10 +70,12 @@ public function getItems(): Collection
         return $this->exists() ? $this->model()->getItems() : collect();
     }
 
-    /**
-     * @inheritDoc
-     */
-    public function addItem(Buyable $product, $qty = 1, $params = []): CartItem
+    public function itemsTotal(): float
+    {
+        return $this->exists() ? $this->model()->itemsTotal() : 0;
+    }
+
+    public function addItem(Buyable $product, int|float $qty = 1, array $params = []): CartItem
     {
         $cart = $this->findOrCreateCart();
 
diff --git a/src/Cart/Models/Cart.php b/src/Cart/Models/Cart.php
index 52fc090d..60b302f2 100644
--- a/src/Cart/Models/Cart.php
+++ b/src/Cart/Models/Cart.php
@@ -123,6 +123,11 @@ public function total(): float
         return $this->items->sum('total');
     }
 
+    public function itemsTotal(): float
+    {
+        return $this->items->sum('total');
+    }
+
     /**
      * The cart's user relationship
      *
diff --git a/src/Contracts/Changelog.md b/src/Contracts/Changelog.md
index 116fd6c8..97a9a9f8 100644
--- a/src/Contracts/Changelog.md
+++ b/src/Contracts/Changelog.md
@@ -13,6 +13,7 @@
 - Added the `Merchant` interface
 - Added the `Schematized` interface
 - Added the `getConfigurationSchema()` method to the `Configurable` interface
+- BC: Added the `itemsTotal()` method to the `CheckoutSubject` interface
 - Added the nette/schema package requirement (v1.2.5+)
 
 ## 3.x Series
diff --git a/src/Contracts/CheckoutSubject.php b/src/Contracts/CheckoutSubject.php
index e1afee33..55ec8710 100644
--- a/src/Contracts/CheckoutSubject.php
+++ b/src/Contracts/CheckoutSubject.php
@@ -22,10 +22,13 @@
 interface CheckoutSubject
 {
     /**
-     * A collection of CheckoutSubjectItem objects
+     *
+     * @return Collection<CheckoutSubjectItem>
      */
     public function getItems(): Collection;
 
+    public function itemsTotal(): float;
+
     /**
      * Returns the final total of the CheckoutSubject (typically a cart)
      */