<string name="total_coffee_cost">You ordered %1$d cups of coffee. nPrepare to pay $%2$d. nThank you!</string>
<string name="total_coffee_cost_zero">You have not ordered any cup of coffee. nTry to choose again. nThank you!</string>

private TextView createOrderSummary(View view){
    CheckBox whippedCreamCheckBox = findViewById(R.id.whipped_cream_checkbox);
    hasWhippedCream = whippedCreamCheckBox.isChecked();

    CheckBox chocolateCheckBox = findViewById(R.id.chocolate_checkbox);
    hasChocolate = chocolateCheckBox.isChecked();

    TextView priceMessage = findViewById(R.id.price_text_view);
    if (numberOfCoffees == 0)
        priceMessage.setText(getString(R.string.total_coffee_cost_zero));
    ....
    else if ((numberOfCoffees > 1) && (!hasWhippedCream) && (!hasChocolate))
    priceMessage.setText(getString(R.string.total_coffee_cost, numberOfCoffees, numberOfCoffees * priceOfCup));
    ....
    return priceMessage;
}

<string name="total_coffee_cost">Hi, %1$s! You ordered %2$d cups of coffee. nPrepare to pay $%3$d. nThank you!</string>