Pencils go down 10% of their value every inch that they are sharpened if an eraser is used then it goes down 25% of its value if the body of the pencils bad quality it goes down to 30% And also these are for basic yellow Hexagonal Pencils
Green end pencil 1
Silver end pencil 2
Bronze end pencil 5
Gold striped end pencil 10
Gold end pencil 11