Skye, good math - good example. The problem that I ran across is that if one is using long estered gear and taking two injects a week, the calculation can become.... cumbersome. This is simply due to the nature of having to keep track of a "running total" of MgDL. I use a spreadsheet and calculate the "decay rate" of the hormone in depot based on the half life...... these are the close approximations:
Acetate, 3 days, 20.63%
Propionate, 4.5 days 14.30%
Enanthate, 10.5 days 7.04%
Declyanate, 15 days 4.52%
Undec, 16.5 days 4.12%
I extrapolated these values and they are close - how they are used, is to determine the amount of hormone released into the system based on the amount in depot - then this amount is (of course) subtracted from MgDL and the factor or percentage is used again to compute the hormone released - tomorrow. An injection just adds to the MgDL. It is easy to track in a spreadsheet.
Give a fella a little curiousity and a computer and it is amazing what he can come up with......