The following information applies to the questions displayed below Data for Hermann Corporation are shown below Per Unit $ 80 Selling price Variable expenses Contribution margin of Sales 100% 55% 45% $ 36 Fixed expenses are $76,000 per month and the company is selling 2,500 units per month 2-a. Refer to the original data. Management is considering usinghigher-quality components that would increase the varlable expense by $4 per unit. The marketing manager belleves that the higher-quality product would increase saes by 20% per month. Calculate the change in total contribution margin. I contribution maig in increasos