How much clomid for this?

250/mg week Test-E
20mg/ed Dinabol (5 Weeks)

How much (mg) Clomid should I do for the PCT cycle?

Is there an exact science to the dosage or is it a different opinion shared by different people?

I do realize these are low dosages of test/dbol.

would this be a good dosage for Clo? - 21 days (100mg ed for 7 days, 50mg ed for days 8-21)

thanks

type in clomid, clik search
most load 300 day 1, then 100 till day 10, 50 on out