is there an ACCURATE way of converting kills to minerals depending on unit?

Current player kills score is at least xxx
----
Add xxx minerals to current player
Subtract xxx kill score

DOES NOT WORK ACCURATELY BECAUSE THEY MAY KILL MORE IN BETWEEN TRIGGERS, WHICH TRIGGERS HIGHER ONES

Use the Wiki.

http://www.staredit.net/wiki/Kills_To_Cash

The kills to cash perfect would be good. Remember to use Hyper Triggers.