Cost minimization cA firm is a cost -minimizer if it produces any given output level y 20 at smallest possible total cost. cly)denotes the firm's smallest possible total cost for producing y units of output ocl) is the firm's total cost function (总成本函数)Cost Minimization uA firm is a cost-minimizer if it produces any given output level y ³ 0 at smallest possible total cost. uc(y) denotes the firm’s smallest possible total cost for producing y units of output. uc(y) is the firm’s total cost function （总成本函数）