Alden Company's monthly data for the past year follow. Management wants to use these data to predict future variable and fixed costs. - Estimate both the variable costs per unit and the total monthly fixed costs using the high-low method. Jote: Do not round intermediate calculations. \begin{tabular}{|l|l|l|} \hline Total variable costs at lowest volume & & \\ \hline Total fixed costs & & \\ \hline \end{tabular}