What is the cost to produce a Blu Ray movie as opposed to a DVD?

[mtlca66]

i really have no clue man, but i've never payed more than 20 bucks for a blu ray... amazon has some good deals. a lot of older movies vary but i saw recently a lot of them for under 10 and 15 bucks. new releases are barely over 20 on amazon as far as i know, which is what I remember dvd's being back in the day