AdvancedAndroid_TeaTime
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Currency symbol system dependent
Initially the activity layout displays a currency symbol $ though once the button is pushed it displays the symbol of my region, the € symbol.
It seems system dependent to me. The test case may need to be adapted to make it run successfully.
To fix this for this project purposes only, change NumberFormat.getCurrencyInstance() to the NumberFormat.getCurrencyInstance(Locale.US) in two places: OrderActivity.displayCost() and OrderSummaryActivity.displayOrderSummary().