Which type of offense involves situations where businesses charge customers different prices based on their gender, race, religion, etc.?

Differential pricing

Explanation:

Differential pricing, also known as discriminatory pricing is a pricing strategy in which the same product are sold to different customers at different prices. It enables companies to take advantage of unique customers valuation.

Even though is mostly seen as a legal way of pricing just like the other pricing methods, but in a situation where it is biased towards a category of people because of their tribes, gender religion other discriminatory factors, it becomes an illegal act.