What is the fine-grained topic of the following text: These financial services have the capacity to increase additional earnings of the stores by Rs 10,000.The technology cost for an Aadhaar-enabled point-of-sale (PoS) machine is approximately about Rs 60,000 and the merchant would then pay Rs 2,500 a month for the services. Only return the topic.
Aadhaar-enabled point-of-sale (PoS) machines in financial services