Where r K + w L ( \\ displaystyle rK + wL \\ , ) is the cost to the firm , r the rental rate of capital , w the wage rate for labor .
P is the price of the output .
where r K + w L ( \\ displaystyle rK + wL \\ , ) is the cost to the firm , r the rental rate of capital , w the wage rate for labor , and P is the price of the output .