By my tally + (6-8) hours of sleep I count that you are over your weekly allotment of Hours....
Seriously...? Fine... here's how it works:
Non-Clinical Employment -- 3 years (1-3), 30 hrs/wk
Clinical Employment -- 2 yrs (4-5), 24-40 hrs/wk
Research (1 poster and 1 oral presentation, 4 projects, 2 medically-related projects, leadership position) -- 5 yrs, 2-10 hrs/wk (0-5)
Non-Clinical Volunteering -- 6 yrs, 6-10 hrs/wk (0-5)
Clinical Volunteering (leadership position) -- 1.5 yrs, 6 hrs/wk (4-5)
Shadowing -- ~50 hrs
Scribing -- ~100 hrs
TA/Lab Instructor/Tutor -- 2 yrs, 10 hrs/wk (4-5)
International Work -- 12 wks in various countries, ongoing work -- closely related to a major area of interest
Other Hobbies & Artistic Endeavors -- 7 yrs, 2-5 hrs/wk -- portfolio available (variable, 0-5)
Pre-Health/Pre-Medical Leadership (oversaw rebuilding of university program & dept) -- 2 yrs, 2-6 hrs/wk (4-5)
Years (using low to midrange estimates because the low to mid-range was where I was most of the time during the school-year with peaks at various times):
1-3 -- ~45 hrs/wk + school (keep in mind, this includes fun ECs; we're not talking up to nearly 45 hrs/wk of work + school; at times, I was able to get some studying done while working)
4-5 -- ~55 hrs/wk + school (once again, some of these positions allowed for studying while working, e.g., during slow times in the ED. Some of these were also variable in terms of time commitments.)
My school schedule was extremely variable depending upon coursework (e.g., music vs science classes), but my mostly science semesters tended to look like:
2 sciences + labs -- 8 hrs lecture + 4 hrs lab + 4 hrs lab work + 1 hr studying = 17 hrs
3 humanities -- 9 hrs lecture + 3 hrs writing papers/studying = 12 hrs
TOTAL = 29 hrs
29+45=74 hrs/wk (yrs 1-3)
29+55=84 hrs/wk (yrs 4-5)
Tougher academic semesters, I scaled back the ECs. When work needed more, I scaled back academics. When I needed to study for the MCAT, I took as much time off as I could and had built up high enough grades in my classes that I could sacrifice my last few test grades and still pull a respectably high A.
Was/is it intense? Absolutely.
Was there sacrifice, crying, and gnashing of teeth at times? Yup.
Was it truly impossible as some of you claim? Apparently not.
That said, I found my limit one month when I attempted about 60 hrs of work along with a full academic schedule. (I accepted another job.) Even though I cut back on my regular ECs to compensate, the stress of the new job was too much. I quit shortly thereafter.
We all have our limits. I definitely don't suggest you attempt what I did. I'm simply not one to say no and I managed to pull things off in spite of that character flaw. It's definitely something I'm working on.