Fictional event budget helper

Write a small Python helper that totals fictional event costs, checks the total against a practice limit and reports the remaining amount.

Requirements

• Store labelled costs in a dictionary.
• Calculate and display the total and remaining amount.
• Handle a non-positive limit clearly.

Expected behaviours

• The example runs in the platform runtime without an external package.
• The output communicates the stated purpose using fictional sample data.
• The learner can describe one limitation and one next improvement.