The movement of the progress bar may be uneven because questions can be worth more or less (including zero) depending on your answer. A package of 8-count AA batteries costs $6.16. A package of 20-count AA batteries costs $15.60. Which statement about the unit prices is true? The 20-count pack of AA batteries has a lower unit price of $0.78 per battery. The 8-count pack of AA batteries has a lower unit price of $0.77 per battery. The 8-count pack of AA batteries has a lower unit price of $0.78 per battery. The 20-count pack of AA batteries has a lower unit price of $0.77 per battery