Employees working primarily at the decision level deal directly with customers and handle all the routine transactions where their decisions follow predetermined policies and procedures that spell out how to handle different situations.

operational

Explanation:

Based on the scenario being described within the question it can be said that the level being described is the operational decision level. Like mentioned in the question this level in which all the processes are handled in order to accomplish a company's overall objective, such as the routine transactions and dealing with customers in person.

answer; to open a new transaction, the user should type the code/0 along with a new transaction code, when done with that the user should press enter to open the transaction; good luck;