Which of the following must be true if at the 10th unit of output, marginal cost is $130 and ATC is $150? a. ATC of producing the 9th unit is higher than $150 b. MC of producing the 9th unit is higher than $130 c. AVC of producing the 10th unit is equal to $20 d. ATC of producing the 9th unit is less than $150 e. AVC of producing the 10th unit is higher than $150
