Each purchase gives 10 units, except the following:<br/><br/>Marines and garrison are 100 people per purchase<br/>Raptors are 5 ships per purchase<br/>Rangers and Wardens are 2 ships per purchase<br/><br/>All units are assumed to take up roughly the same size, and there is no difference in mass warfare for the number of units.<br/><br/>By the way, your numbers are a bit off.  (remember to add +1 to the base cost for green, +3 for trained)<br/><br/>6: Mark V, Green<br/>4: Mark II, Green<br/>3: Green crewed Garrison<br/>3: Green crewed Raptor<br/>5: Trained Guerillas<br/>21 Total<br/><br/>OR<br/>12: Mark V x2, Green<br/>3: Green crewed Raptor<br/>3: Green crewed Sentry<br/>5: Trained Garrison<br/>23 Total