Calculate (a) MAD, (b) MSE, and (c) MAPE for the following forecast versus actual sales figures. (Please round to four decimal places for MAPE.) 
Definitions:
Analytic Marxism
An approach to Marxist theory that combines the insights of classical Marxism with tools and methods from analytical philosophy and the social sciences.
Empirical Methods
refer to the collection of data through observation and experimentation to understand the world.
Neo-Marxism
An approach that applies Marxist theories and methods to contemporary issues, emphasizing culture, ideology, and the role of the state.
Urban Proletarian
A member of the working class who lives in an urban area, often associated with the industrial labor sector.
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