A manufacturing firm estimates that its total production of auto mobile batteries in thousand of unit is f(x,y)=(18x^2/3)y^1/3 Where x is the number of units of labour and y is the number of units of capital utilised. Labor costs are $282 per unit and capital cost or $47 per unit how many units each of labor and capital will maximize production if the firm can spend $39,762 for These costs