I would get rid of the hours and do days. Much easier to understand for people.
Costs are difficult, because many single player games you could in theory finish in about 8-10 hours, if the cost is too small the company lose out massively, if its too high, whats the point. It's really a difficult situation. I mean to rent a 2 hour film is like £3.49 or something in SD, HD is a couple quid more (which is why i generally don't rent films because if i think i will like it i will just buy it).








