Hi Arjuna,

Hopefully this will answer your question using the MoneyPaper Service. Now I will assume that you have a money market account with this service. If so, just move (transfer) the funds into this account and wait for the transaction to take place. When it does, just use Bivio's investments page, select the company inwhich you're purchasing, then select the account where the funds are being held (MPS). So given your example, If MPS only used $100 of your $110. The $10 would remain in that account until your next investment.

I hope this helps. If not, hopfully someone else when stand in with an answer.