September October Sales in units 5,000 7,000 Sales revenue $100,000 $140,000 Cost of goods sold 40,000 56,000 Gross margin 60,000 84,000 Selling and administrative expenses: Shipping expense 7,500 10,500 Clerical expense 10,000 12,000 Maintenance expense 17,000 17,000 Total selling and administrative expense 34,500 39,500 Net operating income $25,500 $44,500 If the Tudor Retailing Company uses the high-low method of analysis, the total monthly fixed cost for Tudor Retailing Company would be estimated to be: Group of answer choices $34,500 $17,000 $27,000 $22,000