The desktop is what a POS used to mean, because the software was a program that only ran on that box. A shop system that runs in a browser does not need the tower. It needs a screen the person on the queue can see, and a connection that can die without losing the sale.

The tablet is the counter
The Blackview Tab 60 Pro, a 10.1 inch Android tablet, was listed at NPR 21,999 by Warrantore when this was written. That is a lot of screen for a till, it sits on a stand, and it does not steal the space a laptop keyboard needs. Android is also where a phone camera reads barcodes most reliably today. If the camera misbehaves, a USB scanner still works.
A laptop is the right machine for the person doing the books in the evening. On the counter it faces the cashier, the hinge is in the way, and a spilled chiya is a keyboard. Use it if you already own it and the queue is short. Do not buy one only to be the till.
A desktop belongs in an office that also bills, or at a counter that never moves and has a proper power backup. It is the most expensive of the three to dedicate to tapping products, and a basic computer in Kathmandu shop guides is often talked about above the tablet price. We are not attaching a laptop price we did not open a listing for.
What has to be true on all three
Pasal is the same counter on a phone, a tablet, a laptop or a desktop. The sale queues on the device when the wifi drops and replays when it returns, without ringing twice. A pretty screen that cannot do that is a display, not a till.
The money for a tablet plus an 80mm printer plus a year of Pro is added up in what a small cafe POS costs. Pasal Complete is that counter as one box, at Rs 49,999 for the first year, hardware included.