add formatMoney helper

app/helpers.php

@@ -0,0 +1,8 @@
+<?php
+
+if (! function_exists('formatMoney')) {
+    function formatMoney(int|float $dollars): string
+    {
+        return '$'.number_format($dollars, 2);
+    }
+}

composer.json

@@ -28,6 +28,9 @@
         "pestphp/pest-plugin-laravel": "^4.0"
     },
     "autoload": {
+        "files": [
+            "app/helpers.php"
+        ],
         "psr-4": {
             "App\\": "app/",
             "Database\\Factories\\": "database/factories/",