I believe if you bought a LIC-X-RAP license, you can still assign it to a controller's serial number in the licensing portal. Then, when you view the certificates; select the "Post 5.0" option from the drop down. I believe your RAP license will be convereted to an AP license. I don't have a license to check with, but seem to remember this for customers back during 3.x to 5.x upgrades.
A 3200 controller has an Campus AP capacity of 32. A Remote AP capacity of 128. You can load up to 128 AP licenses on the controller for use of both Campus and Remote APs. However, for calculation of the capacity, you need to use the formula mentioned ealier. 1 CAP = 4 RAP. This is purelfy for the sizing, not licensing.
Assume Campus AP = X
Assume Remote AP = Y
You can have any number of combinations, so long as X + (4 * Y) is less than or equal to 128 (for the 3200).