Calculate the gross margin ratio for each of the following separate cases A through C: 
Definitions:
Gender Role
Socially constructed roles, behaviors, activities, and attributes that a given society considers appropriate for men and women.
Self-Socialization
The process by which individuals actively contribute to their own development and socialization based on their interpretation of their environment.
Operant Conditioning
A method of learning that employs rewards and punishments for behavior, helping an individual to understand the consequences of actions.
Observational Learning
Attaining new behaviors by seeing and mimicking others.
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