String priceMessage = "Name: " + clientName + "\nAdd whipped cream? " + hasWhippedCream + "\nAdd chocolate? " + hasChocolate + "\nQuantity: " + numbersOfCoffees + "\nTotal: $" + price + "\nThank you!"; //было

//стало
String priceMessage = getString(R.string.priceMessage, clientName, hasWhippedCream, hasChocolate, numbersOfCoffees, price);

<string name="priceMessage">Name: <xliff:g id="clientName" example="Amy">%s</xliff:g>
\nAdd whipped cream? <xliff:g id="hasWhippedCream" example="true">%b</xliff:g>
\nAdd chocolate? <xliff:g id="hasChocolate" example="true">%b</xliff:g>
\nQuantity: <xliff:g id="numbersOfCoffees" example="1">%i</xliff:g>
\nTotal: $ <xliff:g id="price" example="5">%i</xliff:g>\nThank you!</string>