Visual merchandising is considered as an investment, not just an expense. It involves planning the layout, designs, and displays in a retail store to enhance product visibility and drive sales. By treating it as an investment, retailers can see long-term returns through increased customer engagement and sales growth.
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.