I suck big time at math, so I probably wont be any help. I use Novarel HCG. It comes in 2 10 ml bottles. One has the BAC water and the other has the HCG stuff in it. I slowly squirt all of the BAC water into the HCG slowly, swirl the vial until it all dissolves, and and then refrigerate it. Mine is 10,000 USP. When I use my slin pin, I use 25 units twice weekly. That is equal to 250ius two times a week. If you wanted to take 500ius twice weekly, then you would take 50 units on the slin pin each time.
You said you have the 5,000 IUs in amps. I have never used that before. I would guess mixing it all would be equal to 1/2 of the kind I use. Anyone with some more input?