RE:Calculation as is by a computer but [ Is it a headache ]? These shares are not the ones getting the mathematical no value change.
the 300 share for BID=11.50--- Ask=15.00
these are getting changed into3 sets of 100 share for Bid= 3.83-- ASK=5.00
Therefore the single share will still be BID=4.5--ASK=.05
hope that helps