Top Secret/SI from TSR

[SAbel]

Hey has anyone played or is playing this system?
I am stuck right now with the following problem?
the final two Attributes for the game are derived from earlier Attributes .
Example:
Movement = average of Strength and Reflex
Dex = average of Reflex and Int
but both are base Attributes for calculating skills (as are the main Attributes)

I have MOV and DEX as traits right now so it calculates but that means that I can not link skills to them.
***mechanics note for game system*** skills =Attributes score as a % plus 5% per skill level

any idea on how I could make this happen.