A lot of assumptions here. Assuming you could start at the desired wage; assuming that you would be allowed to work 84 hours a week; assuming that you could physically handle a full year of 84 hour weeks; assuming you could mentally and emotionally handle that kind of schedule. If all the above assumptions were met, it would look something like this:
Based on 40 hours at regular hourly wage plus time and one half for all hours worked over that, you would have to start at $10.89/hour.
40 hours (straight time) @$10.89 =$435.60
44 hours (OT @ time & ½) @$16.32=$718.74
Weekly total =$1154.34
Times 52 weeks=60025.68
I once had a job as a backhoe operator, and we could work as long as we wanted for straight time, and time and one-half over 40 hours a week. Especially during the summer, we would try to get out to the site by first light, and work until sundown. I would usually end up working 12–14 hours Monday through Wednesday, knowing any hours I chose to work the rest of the week would run into overtime. The job lasted about 4 months. I was glad to see it come to an end, because I could have a personal life once again (this was about ten years before I got married).