LINES 1-31: Import the libraries
LINES 35-59: Read the dataset and separate variables (In our dataset 'KilosEntrados' and 'FechaRecepcion' are the target variable and Date, respectively)
LINES 62-133: CSMRMR
LINES 135-251: Corresponding functions for SARIMAX
LINES 253-274: Preparation for evaluating the "original" dataset OR LINES 279-291:Preparation for evaluating the "last year discarded" dataset
LINES 299-313: Preparation for DWESR
LINES 315-529: DWESR
LINES 533-573: Graph generation and calculation of results