Comparative income statements for Your Company for two months are presented below: September October Sales in units 11,000 10,000 $165,000 72,600 $92,400 $150,000 66,000 $ 84,000 Sales Revenue Less: Cost of Goods Sold Gross Margin Less Operating Expenses: Expense 1 Expense 2 Expense 3 Expense 4 Total Operating Expenses Net income $ 12,000 13,200 22,000 10,500 $ 47,200 $ 34,200 $ 12,000 12,000 20,000 10.000 $ 40,400 $ 30,000 Expense 2 is a Variable cost OA Fixed cost . Mixed cost