diff --git a/package.json b/package.json
index c787084a..3c27ac2b 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@cowprotocol/cow-sdk",
-  "version": "5.8.0-RC.6",
+  "version": "5.8.0-RC.7",
   "license": "(MIT OR Apache-2.0)",
   "files": [
     "/dist"
diff --git a/src/trading/index.ts b/src/trading/index.ts
index 837d4d3c..e316e43b 100644
--- a/src/trading/index.ts
+++ b/src/trading/index.ts
@@ -18,4 +18,4 @@ export { getEthFlowTransaction } from './getEthFlowTransaction'
 
 export * from './appDataUtils'
 export * from './calculateUniqueOrderId'
-export { swapParamsToLimitOrderParams } from './utils'
+export { swapParamsToLimitOrderParams, mapQuoteAmountsAndCosts } from './utils'
diff --git a/src/trading/utils.ts b/src/trading/utils.ts
index 67965efb..45303a91 100644
--- a/src/trading/utils.ts
+++ b/src/trading/utils.ts
@@ -36,3 +36,39 @@ export function getSigner(signer: Signer | ExternalProvider | PrivateKey): Signe
 export function isAccountAddress(address: any): address is AccountAddress {
   return typeof address === 'string' && /^0x[0-9a-fA-F]{40}$/.test(address)
 }
+
+export function mapQuoteAmountsAndCosts<T, R>(
+  value: QuoteAmountsAndCosts<T>,
+  mapper: (value: T) => R
+): QuoteAmountsAndCosts<R> {
+  const {
+    costs: { networkFee, partnerFee },
+  } = value
+
+  function serializeAmounts(value: { sellAmount: T; buyAmount: T }): { sellAmount: R; buyAmount: R } {
+    return {
+      sellAmount: mapper(value.sellAmount),
+      buyAmount: mapper(value.buyAmount),
+    }
+  }
+
+  return {
+    ...value,
+    costs: {
+      ...value.costs,
+      networkFee: {
+        ...networkFee,
+        amountInSellCurrency: mapper(networkFee.amountInSellCurrency),
+        amountInBuyCurrency: mapper(networkFee.amountInBuyCurrency),
+      },
+      partnerFee: {
+        ...partnerFee,
+        amount: mapper(partnerFee.amount),
+      },
+    },
+    beforeNetworkCosts: serializeAmounts(value.beforeNetworkCosts),
+    afterNetworkCosts: serializeAmounts(value.afterNetworkCosts),
+    afterPartnerFees: serializeAmounts(value.afterPartnerFees),
+    afterSlippage: serializeAmounts(value.afterSlippage),
+  }
+}