system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 why do costumes cost more money than regular clothes despite using seemingly cheaper fabrics?
gpt
Because costumes are specialized equipment that is produced in significantly lower numbers than regular clothing and the demand for specific costumes has a *very* high variance.  

The materials used in a product have almost no bearing on the eventual price. That's mainly determined by demand and supply.