It's probably just the the bond value as per the CGs.
I've been taking the Scout hunting missions from the Aegis megaships, (My Chieftain is down in the Witchhead so I've just got the Krait with me in the Coalsack) this results in taking on the scouts in 3 sets of 4 so batches of 12 giving 4,800,00 Cr bond value. I generally pay around 20,000 Cr between sorties in repair and reloads, though the mission payouts are in the millions (which feels rather gamey- unpopular opinion I know)...