One reason behind this are the lack of cash registers and calculators. Because of that, there’s no other way to calculate other than to look at the accounting book, check the number of times something was sold, and then add them one by one. Naturally, this takes a lot of time.
However with the tool that Ryouma had just made, even without the discount, it’s possible to easily calculate the earnings for the day. You could say that to this world it’s an exceptional tool to save time.
The price Ryouma is asking for is already so cheap to the people of this world that no one would dare to ask for a discount. With a price like that, no one would complain. But even if there was, they would simply be turned down. Ryouma has no intents of entertaining any further discounts than what he’s already set.
But not only is Ryouma’s store cheap, but its speed at calculating compared to other stores is also overwhelmingly fast, allowing the transactions to end easily. When the five people noticed that, their eyes became sharp. But Ryouma didn’t notice that as he continued to indifferently talk.