6. Ingram Co. manufactures office furniture. During the most productive month of the year, 3,500 desks were manufactured at a total cost of $84,400. In its slowest month, the company made 1,100 desks at a cost of $46,000. Using the high-low method of cost estimation, total fixed costs in August are: (Points: 5) $56,000 $28,400 $17,600 cannot be determined from the data given 7. If sales are $820,000, variable costs are 62% of sales, and operating income is $260,000, what is the contribution margin ratio? (Points: 5) 53.1% 38% 62% 32% 8. Variable costs as a percentage of sales for Leamon Inc. are 75%, current sales are $600,000, and fixed costs are $110,000. How much will operating income change if sales increase by $40,000? (Points: 5) $10,000 increase $10,000 decrease $30,000 decrease $30,000 increase