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4. Create project called ContractorCalculator. The main activity layout should contain two Edit Texts, one button, and eight TextViews (Figure 4.13). Hesturant Rating: TextView RATE MEAL Figure 4.13 ContractorCalculator interface The Calculate button should add the labor and material costs from the EditTexts and put the result in the TextView next to Sub Total. Tax should be calculated using a 5% rate (use a constant) and displayed in the TextView next to Tax. The tax and subtotal should be added together and displayed in the TextView next to Total. 4. Create project called ContractorCalculator. The main activity layout should contain two Edit Texts, one button, and eight TextViews (Figure 4.13). Hesturant Rating: TextView RATE MEAL Figure 4.13 ContractorCalculator interface The Calculate button should add the labor and material costs from the EditTexts and put the result in the TextView next to Sub Total. Tax should be calculated using a 5% rate (use a constant) and displayed in the TextView next to Tax. The tax and subtotal should be added together and displayed in the TextView next to Total