Which of the following functions represents the least total cost assuming the number of units is equal in each case? A) y = 90.9 B) y=90 + 5x C) y = 180 + 5X D) y = 180 - 9X Ahlab 45) Which of the following functions represents the least total cost assuming the number of units is equal in each case? A) y=90 + 9x B) y = 90 +5X C) y = 180 + 5x D) y=180 +9X 46) Which of the followinn le on annen