Current-Equity-and-Quantity

I have a question regarding transaction quantity. I am trying to manually calculate the # of shares for three separate buy orders. This code appears to work when two transactions are placed but when adding three the third quantity is never calculated properly. Any suggestions? Is there a better way to do this? I am planning on adding more variables that the advanced possizers don't currently have.

CODE:
   t = PlaceTrade(stock1, TransactionType.Buy, OrderType.Market, 0, "Buy" + stock1);
               t.Quantity = (CurrentEquity / close1[idx]) / 5;
               t1 = PlaceTrade(stock2, TransactionType.Buy, OrderType.Market, 0, "Buy" + stock2);
               t1.Quantity = (CurrentEquity / close2[idx]) / 5;
               t2 = PlaceTrade(stock3, TransactionType.Buy, OrderType.Market, 0, "Buy" + stock3);
               t2.Quantity = (CurrentEquity / close3[idx]) - t1.Quantity - t2.Quantity;