[The following information applies to the questions displayed below.] 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. (Do not round intermediate calculations.) 1. Estimate both the variable costs per unit and the total monthly fixed costs using the high-low method. (Do not round intermediate calculations.)