Cattle on feed should be marketed when: (1pts) their average cost of gain is no longer below their selling price their marginal cost of gain is no longer below their selling price their marginal cost of gain is no longer below their original purchase price they have reached their maximum weight 14) A production function is in the amount of physical product obtained with different: (1pts) levels of input output prices input prices ratios of input and output prices Solution Cattle on feed should be marketed when: Solution- their marginal cost of gain is no longer below their selling price A production function is in the amount of physical product obtained with different: Solution- levels of input .