Compute the total commission for the following commission payment plans. 
Definitions:
Control Group
In experimental research, a group of subjects that does not receive the experimental treatment, serving as a comparison to assess the effect of the treatment.
Goals Of Psychology
To describe, explain, predict, and change behavior and mental processes through the application of scientific methods.
Describe
To give a detailed account or picture of a situation, event, pattern, or the like, in words.
Predict
The ability to foretell or forecast future events based on current data or observations.
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