Retailing encompasses all activities involved in the sale of goods and services directly to consumers. It includes customer service, health and safety regulations, product distribution, and maintenance, making it essential to the retail business model.
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.