diff --git a/src/fmg-components/cart/cart.vue b/src/fmg-components/cart/cart.vue
index 1ba5ea562..dcf1375b7 100644
--- a/src/fmg-components/cart/cart.vue
+++ b/src/fmg-components/cart/cart.vue
@@ -915,48 +915,16 @@ export default {
             return this.getCmsContent("SubtotalTextWidget", "Text");
         },
         subTotal() {
-            let subTotal = 0;
-
-            if (this.showCoverageAsVerified || this.showCoverageAsPending) {
-                // only include items NOT covered by insurance
-                this.cartItems.forEach((cartItem) => {
-                    if (!cartItem.isCoveredByInsurance) {
-                        subTotal += cartItem.subTotal ?? 0;
-                    }
-                });
-                // add deductible amount still to pay
-                subTotal += this.deductibleLineItem.subTotal ?? 0;
-            } else {
-                this.cartItems.forEach((cartItem) => {
-                    subTotal += cartItem.subTotal ?? 0;
-                });
-            }
-
-            return subTotal;
+            return baseMixin.methods.getSubTotal(this.lineItems);
         },
         salesTax() {
-            let salesTax = 0;
-
-            if (this.showCoverageAsVerified || this.showCoverageAsPending) {
-                // only include items NOT covered by insurance
-                this.cartItems.forEach((cartItem) => {
-                    if (!cartItem.isCoveredByInsurance) {
-                        salesTax += cartItem.salesTax ?? 0;
-                    }
-                });
-            } else {
-                this.cartItems.forEach((cartItem) => {
-                    salesTax += cartItem.salesTax ?? 0;
-                });
-            }
-
-            return salesTax;
+            return baseMixin.methods.getSalesTax(this.lineItems);
         },
         amountDue() {
             if (this.showAsPaid) {
                 return 0;
             }
-            return this.subTotal + this.salesTax;
+            return baseMixin.methods.getAmountDue(this.lineItems);
         },
         amountPaid() {
             if (!this.showAsPaid) {
diff --git a/src/mixins/base-mixin.js b/src/mixins/base-mixin.js
index ec49c3f0f..7e4fe2ce3 100644
--- a/src/mixins/base-mixin.js
+++ b/src/mixins/base-mixin.js
@@ -132,27 +132,32 @@ export default {
                 currency: "USD",
             });
         },
-        getAmountDue(lineItems) {
+        getAmountDue(lineItems, includeTax = true) {
             var amountDue = 0;
             if (lineItems.glassParts) {
                 amountDue += this.getTotalPriceOfAllLineItemsAndChildParts(
                     lineItems.glassParts,
-                    true
+                    includeTax
                 );
             }
             if (lineItems.supportingItems) {
                 amountDue += this.getTotalPriceOfAllLineItemsAndChildParts(
                     lineItems.supportingItems,
-                    true
+                    includeTax
                 );
             }
             if (lineItems.vaps) {
-                amountDue += this.getTotalPriceOfAllLineItemsAndChildParts(lineItems.vaps, true);
+                amountDue += this.getTotalPriceOfAllLineItemsAndChildParts(
+                    lineItems.vaps,
+                    includeTax
+                );
             }
             if (lineItems.promos) {
-                amountDue += this.getTotalPriceOfAllLineItemsAndChildParts(lineItems.promos, true);
+                amountDue += this.getTotalPriceOfAllLineItemsAndChildParts(
+                    lineItems.promos,
+                    includeTax
+                );
             }
-
             if (
                 store.getters.payment.insuranceCoverage.isVerified &&
                 !store.getters.policy.isNoComp &&
@@ -163,6 +168,17 @@ export default {
 
             return ((amountDue * 100) / 100).toFixed(2);
         },
+        getSubTotal(lineItems) {
+            // this is amountDue without sales tax
+            return this.getAmountDue(lineItems, false);
+        },
+        getSalesTax(lineItems) {
+            // this is amountDue minus subTotal
+            return (
+                ((this.getAmountDue(lineItems) - this.getSubTotal(lineItems)) * 100) /
+                100
+            ).toFixed(2);
+        },
         scrollToPageTop() {
             const container = document.getElementsByClassName("page-container-grouped-styles")[0];
             container.scrollTo({ top: 0, left: 0, behavior: "smooth" });