The market formula is used by suppliers to determine the final price of a product, taking into account various factors such as discounts, taxes, and freight charges. It helps calculate the price that is competitive in the market while covering the supplier’s costs.
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.