Title: Mobile App Development for iOS and Android ISBN: 9781943153909 Authors: Jakob Iversen and Michael Eierman Publisher: New Riders PTG Publication Date: 2021 Edition: 3 ED.

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Project: Chapter 4, pg. 65, Exercise #4 Create a project called ContractorCalculator. Refer to the instructions in the textbook. Create project called ContractorCalculator. The main activity layout should contain two EditTexts, one button, and eight TextViews (Figure 4.13)

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 SubTotal. 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.