diff --git a/backend/app/src/main/java/eu/viandeendirect/domains/payment/StripePaymentManager.java b/backend/app/src/main/java/eu/viandeendirect/domains/payment/StripePaymentManager.java
index 3e707f9..03c0941 100644
--- a/backend/app/src/main/java/eu/viandeendirect/domains/payment/StripePaymentManager.java
+++ b/backend/app/src/main/java/eu/viandeendirect/domains/payment/StripePaymentManager.java
@@ -17,7 +17,7 @@ public interface StripePaymentManager {
     void processPaymentValidation(Order order);
 
     default SessionCreateParams.LineItem getLineItem(OrderItem orderItem) {
-        long unitAmount = orderItem.getUnitPrice().longValue() * orderItem.getPackageLot().getNetWeight().longValue() * 100;
+        long unitAmount = getUnitAmount(orderItem);
         long quantity = orderItem.getQuantity().longValue();
         LOGGER.debug("creating Stripe payment's line item for order item {} x{} for {} euro-cents each", orderItem.getPackageLot().getLabel(), quantity, unitAmount);
         return SessionCreateParams.LineItem.builder()
@@ -35,4 +35,8 @@ default SessionCreateParams.LineItem getLineItem(OrderItem orderItem) {
                 .build();
     }
 
+    default long getUnitAmount(OrderItem orderItem) {
+        return Float.valueOf(orderItem.getUnitPrice() * orderItem.getPackageLot().getNetWeight() * 100).longValue();
+    }
+
 }
diff --git a/backend/app/src/test/java/eu/viandeendirect/domains/payment/TestStripePaymentManager_getUnitAmount.java b/backend/app/src/test/java/eu/viandeendirect/domains/payment/TestStripePaymentManager_getUnitAmount.java
new file mode 100644
index 0000000..2006eae
--- /dev/null
+++ b/backend/app/src/test/java/eu/viandeendirect/domains/payment/TestStripePaymentManager_getUnitAmount.java
@@ -0,0 +1,32 @@
+package eu.viandeendirect.domains.payment;
+
+import eu.viandeendirect.model.OrderItem;
+import eu.viandeendirect.model.PackageLot;
+
+import org.assertj.core.api.Assertions;
+import org.junit.jupiter.api.Test;
+import org.mockito.Mockito;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class TestStripePaymentManager_getUnitAmount {
+
+    @Test
+    void testGetUnitAmount() {
+        // given
+        StripePaymentManager stripePaymentManagerImpl = Mockito.mock(StripePaymentManager.class);
+        Mockito.doCallRealMethod().when(stripePaymentManagerImpl).getUnitAmount(Mockito.any());
+        PackageLot packageLot = new PackageLot();
+        packageLot.setNetWeight(0.2f);
+        OrderItem orderItem = new OrderItem();
+        orderItem.setUnitPrice(0.2f);
+        orderItem.setPackageLot(packageLot);
+
+        // when
+        long unitAmount = stripePaymentManagerImpl.getUnitAmount(orderItem);
+
+        // then
+        Assertions.assertThat(unitAmount).isEqualTo(4);
+    }
+
+}
\ No newline at end of file