3.57 points Rock Inc. has three divisions, Granite, Lime and Nina. All fixed costs are unavoidable Following is the income statement for the previous year: 511,000 275,000 $ 229,000 $1,015,000 176,000 124,600 100,800 401400 Sales Variable Costs Contribution Margin Fixed Costs (allocated Profit Margir 335,000 150,400128,200 613,600 263,000 170,250107,750 541,000 72,000 (19,850) 20,450 72,600 a. What would Rock's profit margin be if the Lime division was dropped? b. What would Rock's profit margin be if the Nina division was dropped