Here is an example summary of this reading selection:

In “My Secret Life on the McJob: Fast Food Managers,” Jerry Newman classifies managers of fast food restaurants as “toxic,” “mechanical,” “relationship,” and “performance.” “Toxic” managers deride employees to express their disappointment, even when employees are generally exceptional. “Mechanical” managers (mostly assistant managers) do their jobs dependably but without enthusiasm. “Relationship” managers—a rare breed—show that they care about employees by being pleasant and helping employees out when needed. “Performance” managers have high standards, are clear about expectations, and consistently reinforce the rules, relaxing occasionally during slack times or with good employees.

Your summary will differ from this one in the way it is written, but it should include roughly the same information.