How to use MOA info

[BBF]

 This may not be the right forum for this, if so kindly move it to where it should be.

I need help in figuring out what and how to interpret the MOA numbers given in some trajectory charts.  I do not have any scopes that have those outside knobs for adjusting the zero.

For example, suppose I see the following info
100           200         300
  X            -3.9"       - 14.5"
         MOA adjustment
                 +1.9          +4.6

Presuming I have a scope with a 1/4" per click @ 100 yards how many clicks? I would normally use 8 clicks to get to a 200 yard zero and 11 clicks for the 300 yard zero. Is this correct?
     at 200 yards One(1) click will change the scope 1/2 inch. At 300 yards I presume it is 3/4 inch .

Are there scopes that use MOA  instead of inch per clicks on their adjustment knobs?

[PowPow]

Looks like you got it right, except for the 300 should be 14.5 / .75 = 18 clicks

Sounds like you would enjoy playing with this calculator:
http://www.biggameinfo.com/index.aspx?page=%2fbalcalc.ascx

My experience has been that even some pretty good scopes are not exactly 1/4" or 1 MOA per click.
You just get what you get and you need to know what your scope does.