The cash counter is where customers finalize their purchases, and it is often the point where the highest volume of customer interaction occurs. This is because the cashier interacts with each customer to process their payment and complete the transaction.
On the day of her examination, Riya sharpened her pencil from both ends as shown below. 
The diameter of the cylindrical and conical part of the pencil is 4.2 mm. If the height of each conical part is 2.8 mm and the length of the entire pencil is 105.6 mm, find the total surface area of the pencil.