How to use "per" in a sentence

A simulator cost five units per hour, which was a lot - but it was worth it for the escape it offered from the city.

You will also have one Ultranet Talk Hour per week to speak to friends and family

She believed in death and taxes, in the inevitability of slot-machine jackpots, in all-you-can-eat casino buffets for $5.95 per person, in the Lord God Almighty, in the truth of alien abductions and Big Foot, but she didn't believe in ghosts.

Considering the fearsome number of meetings I had to sit through, my per-hour wage penciled out at less than I would have made if I had taken a part-time job at McDonald's.