[The following information applies to the questions displayed below.,] Alden Co.'s monthly sales and cost data for its operating activities of the past year follow. Management wants to use these data to predict future fixed and variable costs. Total Cost Month Total Cost 267,116 153,250 63,500 132,125 95,500 80,150 Month Sales Sales $358,500 $321,500 159,000 102,750 207,100 8 9 10 271,500 75,700 151,500 95,500 101,500 2 4 5 6 166,500 266,500 206,500 1,500 291,500 203,000 191,500 113,500 12