Carry the Answer to Three Decimal Places $I _ { S }$

Carry the answer to three decimal places. A set of 2-inch-wide by $I _ { S }$ -inch-thick carbon brushes fits the brush holders too tightly. It is necessary to take $I _ { H }$ inch off the width and 0.015 inch off the thickness by sanding. Give in decimal form the thickness dimension of the carbon brushes after sanding.