A rationale consumer will maximize total utility by consuming; 40 units of X and 28 units of Z. 28 units of X and 40 units of Z. Can not be determined with these data. None of the above. QUESTION 19 At point B, marginal Utility of X divided by Price of Z shows that for the last dollar spent on Z, the utility received is: U 7.5 Utiles 12 Utles. m. 2.34 Utiles. None of the above. At point F, Total Cost of Production is: O $12,000 $17,000 $34,000 O $10,000