diff --git a/1-exercise-solutions/lesson-01/1d.html b/1-exercise-solutions/lesson-01/1d.html
index bdf7ff6..ce6bc45 100644
--- a/1-exercise-solutions/lesson-01/1d.html
+++ b/1-exercise-solutions/lesson-01/1d.html
@@ -11,11 +11,11 @@
 
     <script src="https://unpkg.com/supersimpledev/babel.js"></script>
     <script type="text/babel">
-      const productCost = 10 + 8 * 2;
+      const productCost = `$${10 + 2*8}`;
       console.log(productCost);
 
       const container = document.querySelector('.js-container');
       ReactDOM.createRoot(container).render();
     </script>
   </body>
-</html>
\ No newline at end of file
+</html>