python codes and simulation of shopping purchase?

You are expected to use python Object-Oriented programming concepts to design and implement a system in python for building a scientific calculator which inherits its basic operations from a standard calculator. The standard calculator can perform two types of operations: an addition and a subtraction The standard calculator is capable of inputting only two integers. But the scientific calculators can also interpret decimal values. The scientific calculator is capable of four operations: addition, subtraction, cosine and sine of values. The scientific calculator can accept multiple values for the addition operation. After performing an addition, the scientific calculator will send the final result to a database. (You are not expected to write the codes for the database connection and the queries. You are expected to only show how you can use your scientific calculator object to pass messages to a database object)        Create 100 objects for your scientific calculator to enable…

Is selecting several alternatives that are related very beneficial when using dynamic programming? Do you feel there is anything more I should know?