diff --git a/integration-tests/modules/__tests__/cart/store/cart.workflows.spec.ts b/integration-tests/modules/__tests__/cart/store/cart.workflows.spec.ts
index 05b8bd93c9..e2c46f7486 100644
--- a/integration-tests/modules/__tests__/cart/store/cart.workflows.spec.ts
+++ b/integration-tests/modules/__tests__/cart/store/cart.workflows.spec.ts
@@ -367,6 +367,11 @@ medusaIntegrationTestRunner({
             },
           ])
 
+          const region = await regionModuleService.create({
+            name: "US",
+            currency_code: "usd",
+          })
+
           const priceSet = await pricingModule.create({
             prices: [
               {
@@ -405,6 +410,7 @@ medusaIntegrationTestRunner({
 
           const { errors } = await createCartWorkflow(appContainer).run({
             input: {
+              region_id: region.id,
               sales_channel_id: salesChannel.id,
               items: [
                 {
diff --git a/packages/core/core-flows/src/definition/cart/steps/find-one-or-any-region.ts b/packages/core/core-flows/src/definition/cart/steps/find-one-or-any-region.ts
index 248ef6c090..4df25c3d46 100644
--- a/packages/core/core-flows/src/definition/cart/steps/find-one-or-any-region.ts
+++ b/packages/core/core-flows/src/definition/cart/steps/find-one-or-any-region.ts
@@ -12,6 +12,7 @@ export const findOneOrAnyRegionStep = createStep(
     )
 
     if (!data.regionId) {
+      // TODO: Pick up the default store region if none is provided
       const regions = await service.list({})
 
       if (!regions?.length) {
diff --git a/packages/core/core-flows/src/definition/cart/steps/validate-variant-prices.ts b/packages/core/core-flows/src/definition/cart/steps/validate-variant-prices.ts
index 5b63ca69be..f38922eb2e 100644
--- a/packages/core/core-flows/src/definition/cart/steps/validate-variant-prices.ts
+++ b/packages/core/core-flows/src/definition/cart/steps/validate-variant-prices.ts
@@ -1,11 +1,13 @@
 import { BigNumberInput } from "@medusajs/types"
-import { MedusaError, isDefined } from "@medusajs/utils"
+import { MedusaError, isPresent } from "@medusajs/utils"
 import { createStep } from "@medusajs/workflows-sdk"
 
 interface StepInput {
   variants: {
     id: string
-    calculated_price?: BigNumberInput
+    calculated_price?: {
+      calculated_amount?: BigNumberInput | null
+    }
   }[]
 }
 
@@ -14,9 +16,8 @@ export const validateVariantPricesStep = createStep(
   validateVariantPricesStepId,
   async (data: StepInput, { container }) => {
     const priceNotFound: string[] = []
-
     for (const variant of data.variants) {
-      if (!isDefined(variant.calculated_price)) {
+      if (!isPresent(variant?.calculated_price?.calculated_amount)) {
         priceNotFound.push(variant.id)
       }
     }
diff --git a/packages/core/core-flows/src/definition/cart/workflows/list-shipping-options-for-cart.ts b/packages/core/core-flows/src/definition/cart/workflows/list-shipping-options-for-cart.ts
index 58668f1002..326b895787 100644
--- a/packages/core/core-flows/src/definition/cart/workflows/list-shipping-options-for-cart.ts
+++ b/packages/core/core-flows/src/definition/cart/workflows/list-shipping-options-for-cart.ts
@@ -1,5 +1,5 @@
 import { ListShippingOptionsForCartWorkflowInputDTO } from "@medusajs/types"
-import { deepFlatMap, MedusaError } from "@medusajs/utils"
+import { deepFlatMap, isPresent, MedusaError } from "@medusajs/utils"
 import {
   createWorkflow,
   transform,
@@ -78,7 +78,10 @@ export const listShippingOptionsForCartWorkflow = createWorkflow(
           ({ shipping_options }) => {
             const { calculated_price, ...options } = shipping_options ?? {}
 
-            if (options?.id && !calculated_price) {
+            if (
+              options?.id &&
+              !isPresent(calculated_price?.calculated_amount)
+            ) {
               optionsMissingPrices.push(options.id)
             }