The most horrible thing about invention is the randomness. A bad run of luck and you are out millions of ISK with nothing to show for it.
The greatest thing about invention is the randomness. A run of good luck and your profit margins for the next round of production can be huge!
I had 20 new Invulnerability Field BPCs to invent from and put them in the labs last night, rolling out 12 successful inventions, 2 over expected odds. This makes up a little bit for 4 cloaking invention jobs last week where only 1 worked.
So this morning I put 10 invul fields I had left over from last batch on the market along with the two completed Onyx HICs. When they sell I'll get the parts to build the 120 Invulnerability Fields and 10 Covert Ops Cloaks.
Once all my current plans have come to fruition, my wallet should be back aorund the 700 million range.