In the question, all details are given. using these details it would be easy to determine the required answer. It is already given that Paolo paid $244 for buying 5 identical calculators. It is required to find the amount necessary to buy a single calculator.
Then
Amount required for buying 5 calculators = 244 dollars
Amount required to buy 1 calculator having same specification = (244/5) dollars
= 48.80 dollars
So the amount required to buy 1 calculator having identical features is $48.80