CSR-1392

do not pass null items to getTotalPrice logic

src/fmg-components/cart/cart.vue

@@ -7,7 +7,7 @@
                 @click="toggleClass()">
                 <div class="col d-flex justify-content-between">
                     <span class="label">Amount Due</span
-                    ><span class="label amount-due">${{ amountDue }}</span>
+                    ><span class="label amount-due">{{ amountDue }}</span>
                 </div>
             </div>
             <div class="price-table">
@@ -123,7 +123,7 @@ export default {
             return price;
         },
         getAmountDue() {
-            return baseMixin.methods.getAmountDue(this.storeLineItems);
+            return baseMixin.methods.getDisplayAmountDue(this.storeLineItems);
         },
         removeItem(item) {
             this.$emit("cart-remove", item);

src/mixins/base-mixin.js

@@ -128,9 +128,11 @@ export default {
             const itemsClone = { ...lineItems };
             delete itemsClone.serverData;
             for (var propertyName in itemsClone) {
-                amountDue += this.getTotalPriceOfAllLineItemsAndChildParts(
-                    itemsClone[propertyName]
-                );
+                if (itemsClone[propertyName]){
+                    amountDue += this.getTotalPriceOfAllLineItemsAndChildParts(
+                        itemsClone[propertyName]
+                    );
+                }
             }
             return amountDue;
         },