Update business case form with currency symbol and improved functionality

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

config.json

@@ -5,17 +5,17 @@
     "company_name": "gfdgdf",
     "email": "gfdgf",
     "phone": "gfdgfdg",
-    "store_name": "test222",
+    "store_name": "test1232",
     "country": "gfdgfd",
     "starting_date": "2025-09-25",
     "duration": 36,
     "store_types": [
       "Convenience"
     ],
-    "currency_symbol": "$",
+    "currency_symbol": "€",
     "convenience_store_type": {
       "stores_number": 1233,
-      "monthly_transactions": 32131312,
+      "monthly_transactions": 3211312,
       "has_digital_screens": true,
       "screen_count": 2,
       "screen_percentage": 123123,