You can buy hair product in a 8-ounce bottle for $0.64 or in a 6-ounce bottle for $0.42. Which is the better deal?

Question

You can buy hair product in a 8-ounce bottle for $0.64 or in a 6-ounce bottle for $0.42. Which is the better deal?

Answer 1

8 ounces for 64 cents is 64//8 = 8 cents per ounce

6 ounces for 42 cents is 42/6 = 7 cents per ounce

the 6 ounce bottle is the better deal

which is a surprise as the "volume discount" pricing is usually the reverse situation