Unit 7 [AB224 Assignment Template] the Spreading effect and the Diminishing Returns effect cause the average to to be different. a. Production of the 10th Gizmo resulted in an average total cost (ATC) of $20, production of the 11" Gizmo resulted in an average total cost of $22. (3 point b. Production of the 10th Gizmo resulted in an average total cost (ATC) of $20 production of the 11" Gizmo resulted in an average total cost of $18. (3 poin