diff --git a/package-lock.json b/package-lock.json
index 5794158b4..77e8d3a6a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -11,7 +11,7 @@
       "license": "GPL-3.0",
       "devDependencies": {
         "@mate-academy/eslint-config": "latest",
-        "@mate-academy/scripts": "^1.8.6",
+        "@mate-academy/scripts": "^1.9.12",
         "eslint": "^8.57.0",
         "eslint-plugin-jest": "^28.6.0",
         "eslint-plugin-node": "^11.1.0",
@@ -1467,10 +1467,11 @@
       }
     },
     "node_modules/@mate-academy/scripts": {
-      "version": "1.8.6",
-      "resolved": "https://registry.npmjs.org/@mate-academy/scripts/-/scripts-1.8.6.tgz",
-      "integrity": "sha512-b4om/whj4G9emyi84ORE3FRZzCRwRIesr8tJHXa8EvJdOaAPDpzcJ8A0sFfMsWH9NUOVmOwkBtOXDu5eZZ00Ig==",
+      "version": "1.9.12",
+      "resolved": "https://registry.npmjs.org/@mate-academy/scripts/-/scripts-1.9.12.tgz",
+      "integrity": "sha512-/OcmxMa34lYLFlGx7Ig926W1U1qjrnXbjFJ2TzUcDaLmED+A5se652NcWwGOidXRuMAOYLPU2jNYBEkKyXrFJA==",
       "dev": true,
+      "license": "MIT",
       "dependencies": {
         "@octokit/rest": "^17.11.2",
         "@types/get-port": "^4.2.0",
diff --git a/package.json b/package.json
index 73477abb9..04c53d063 100644
--- a/package.json
+++ b/package.json
@@ -17,7 +17,7 @@
   "license": "GPL-3.0",
   "devDependencies": {
     "@mate-academy/eslint-config": "latest",
-    "@mate-academy/scripts": "^1.8.6",
+    "@mate-academy/scripts": "^1.9.12",
     "eslint": "^8.57.0",
     "eslint-plugin-jest": "^28.6.0",
     "eslint-plugin-node": "^11.1.0",
diff --git a/src/calculateRentalCost.js b/src/calculateRentalCost.js
index 1e3a27d11..24c34dd95 100644
--- a/src/calculateRentalCost.js
+++ b/src/calculateRentalCost.js
@@ -5,6 +5,17 @@
  */
 function calculateRentalCost(days) {
   // write code here
+  let cost = 40 * days;
+
+  if (days >= 3) {
+    if (days >= 7) {
+      cost -= 50;
+    } else {
+      cost -= 20;
+    }
+  }
+
+  return cost;
 }
 
 module.exports = calculateRentalCost;