Assume that the last worker hired of type A serves 100 additional customers per week at a wage of $500 per week and the last worker hired of type B

Assume that the last worker hired of type A serves 100 additional customers per week at a wage of $500 per week and the last worker hired of type B serves 200 additional customers per week at a wage of $1000 per week. Assuming that the company is currently spending its entire budget for labor, should the company alter its current allocation of labor types? If so, how? If not, why?