The marginal product of labor $($measured in units of output$)$ for Expando Corp. is given by M P L $=$ A$(400$ L$)$ where A measures productivity and L is the number of labor hours used in production. Suppose the price of output is $$3$ per unit and A $=2\mathrm{.}0.$ What will be the demand for labor if the nominal wage is $$18?$