Mike is right. Generally most airlines are looking for FAR Part 1 PIC time (designated aircraft commander). As far as adding times together, that is usually airline specific. For example, SWA considers all time PIC after your upgrade (MP) to aircraft commander minus other time. If you have access to a Flying History Report you'd take Primary+Secondary+IP/EP+(.3xtotal sorties)=PIC Turbine (do not count other time).
I'm assuming you've flown with buddies from time to time with equal quals and you were not the "A" code. I've got some buds who have listed approximately 90% of their time from MP upgrade as PIC...this to account for those times listed above. I wish I would have kept an AF log book for this reason. It is somewhat frustrating since the AF does not track how many hours you have carried the "A".
Bottom line, it depends and you should probably call the HR department of whatever company you are interested in. Hope this might be of some help.