I'm not sure which was more funny to me however..... the reference to an abacus for calculations, or the fact that you need to calculate your credit for virtual bidding...
On a serious note, I wonder how much money was lost today on virtual bids in PJM.
Free tip: Do not dec bid PEP Zone @ $350 when the mid-a is healthy.
Free tip #2: Don't export from the pool on hot days unless you like fees.
**Edit*** Also, don't forget to make sure you are on the right INC/DEC page in PJM eMKT.